foreach($pays AS $continent => $l)
{
	foreach($l AS $code => $name)
	{
		preg_match('#en\.wikipedia\.org/wiki/([^"]+)#', file_get_contents('http://fr.wikipedia.org/wiki/'.$name), $url);
		$pays[$continent][$code] = $url[1];
	}
}
 
echo '<pre>',var_export($pays, true),'</pre>';

array (
  'Amérique' => 
  array (
    'antiguaEtBarbuda' => 'Antigua_and_Barbuda',
    'argentine' => 'Argentina',
    'bahamas' => 'The_Bahamas',
    'barbade' => 'Barbados',
    'belize' => 'Belize',
    'bolivie' => 'Mining_in_Bolivia',
    'bresil' => NULL,
    'canada' => NULL,
    'chili' => 'Chile',
    'colombie' => 'Federal_Research_Division',
    'costaRica' => NULL,
    'cuba' => 'Cuba',
    'republiqueDominicaine' => NULL,
    'dominique' => 'Dominic',
    'equateur' => NULL,
    'etatsUnis' => NULL,
    'grenade' => 'Grenade_(disambiguation)',
    'guatemala' => 'Guatemala',
    'guyana' => 'Guyana',
    'haiti' => NULL,
    'honduras' => 'Honduras',
    'jamaique' => NULL,
    'mexique' => 'SS_Potrero_del_Llano',
    'nicaragua' => 'Nicaragua',
    'panama' => 'Panama',
    'paraguay' => 'Paraguay',
    'perou' => NULL,
    'saintCristopheEtNieves' => NULL,
    'sainteLucie' => 'Saint_Lucia',
    'saintVincentEtLesGrenadines' => 'Saint_Vincent_and_the_Grenadines',
    'salvador' => 'Universidad_Centroamericana_%C2%AB_Jos%C3%A9_Sime%C3%B3n_Ca%C3%B1as_%C2%BB',
    'suriname' => 'Suriname',
    'triniteEtTobago' => NULL,
    'uruguay' => 'Celulosa_Arauco_y_Constituci%C3%B3n',
    'venezuela' => 'Venezuela',
  ),
  'Asie' => 
  array (
    'afghanistan' => 'Afghanistan',
    'arabieSaoudite' => NULL,
    'armenie' => NULL,
    'azerbaidjan' => NULL,
    'bahrein' => NULL,
    'bangladesh' => 'Jagjit_Singh_Aurora',
    'bhoutan' => NULL,
    'birmanie' => 'Siddharth_Varadarajan',
    'brunei' => NULL,
    'cambodge' => 'Cambodia',
    'chine' => 'Pan_Yue',
    'coreeDuSud' => NULL,
    'coreeDuNord' => NULL,
    'emiratsArabeUnis' => NULL,
    'georgie' => NULL,
    'inde' => 'Sudhir_Mishra',
    'indonesie' => NULL,
    'iraq' => 'Iraq',
    'iran' => 'Iran',
    'israel' => NULL,
    'japon' => 'Japan',
    'jordanie' => 'Islamic_New_Year',
    'kazakhstan' => 'Kazakhstan',
    'kirghistan' => NULL,
    'koweit' => NULL,
    'laos' => 'Laos',
    'liban' => 'Lebanon',
    'malaisie' => 'Malaysia',
    'maldives' => 'Maldives',
    'mongolie' => 'Mongolia',
    'nepal' => NULL,
    'oman' => 'Oman',
    'ouzbekistan' => NULL,
    'pakistan' => 'Pakistan',
    'philippines' => 'taglish',
    'qatar' => 'Qatar',
    'singapour' => 'Media_Development_Authority',
    'sriLanka' => NULL,
    'syrie' => NULL,
    'tadjikistan' => 'Karshi-Khanabad',
    'taiwan' => NULL,
    'thailande' => NULL,
    'timorOriental' => NULL,
    'turkmenistan' => NULL,
    'turquie' => 'George_Horton',
    'vietNam' => NULL,
    'yemen' => 'Yemen',
  ),
  'Europe' => 
  array (
    'allemagne' => 'Germany',
    'albanie' => 'Albania',
    'andorre' => NULL,
    'autriche' => 'ASFINAG',
    'bielorussie' => NULL,
    'belgique' => 'Belgium',
    'bosnieHerzegovine' => NULL,
    'bulgarie' => 'Bulgaria',
    'croatie' => 'Anthony_Francis_Lucas',
    'danemark' => 'Denmark',
    'espagne' => 'Spain',
    'estonie' => 'Estonia',
    'finlande' => 'Finland',
    'france' => NULL,
    'grece' => NULL,
    'hongrie' => 'Dobos_torte',
    'irlande' => 'Ireland_(disambiguation)',
    'islande' => 'Iceland',
    'italie' => 'Italy',
    'lettonie' => 'Latvia',
    'liechtenstein' => 'Liechtenstein',
    'lituanie' => 'Lithuania',
    'luxembourg' => 'Luxembourg_(disambiguation)',
    'exRepubliqueYougoslaveDeMacedoine' => NULL,
    'malte' => 'Malta',
    'moldavie' => 'Moldova',
    'monaco' => 'Philip_Green',
    'norvege' => NULL,
    'paysBas' => 'Netherlands',
    'pologne' => 'Poland',
    'portugal' => 'Portuguese_Malacca',
    'roumanie' => 'Romania',
    'royaumeUni' => 'Slave_Trade_Act',
    'russie' => 'Russia',
    'saintMarin' => 'San_Marino',
    'serbieEtMontenegro' => NULL,
    'slovaquie' => 'Slovakia',
    'slovenie' => NULL,
    'suede' => NULL,
    'suisse' => 'Switzerland',
    'republiqueTcheque' => NULL,
    'ukraine' => 'Ukraine',
    'vatican' => 'Vatican_City',
  ),
  'Océanie' => 
  array (
    'australie' => 'Eureka_Rebellion',
    'fidji' => 'Fiji',
    'kiribati' => 'Kiribati',
    'marshall' => 'Marshall',
    'micronesie' => NULL,
    'nauru' => 'Nauru',
    'nouvelleZelande' => NULL,
    'palaos' => 'Palau',
    'papouasieNouvelleGuinee' => NULL,
    'salomon' => 'Salomon',
    'samoa' => 'Samoa',
    'tonga' => 'Tonga',
    'tuvalu' => 'Tuvalu',
    'vanuatu' => 'Vanuatu',
  ),
)

 
			'America' => array(
				'antiguaEtBarbuda' => 'Antigua and Barbuda',
				'argentine' => 'Argentina',
				'bahamas' => 'The Bahamas',
				'barbade' => 'Barbados',
				'belize' => 'Belize',
				'bolivie' => 'Bolivia',
				'bresil' => 'Brazil',
				'canada' => 'Canada',
				'chili' => 'Chile',
				'colombie' => 'Colombia',
				'costaRica' => 'Costa Rica',
				'cuba' => 'Cuba',
				'republiqueDominicaine' => 'Dominican Republic',
				'dominique' => 'Dominic',
				'equateur' => 'Ecuador',
				'etatsUnis' => 'United States',
				'grenade' => 'Grenada',
				'guatemala' => 'Guatemala',
				'guyana' => 'Guyana',
				'haiti' => 'Haiti',
				'honduras' => 'Honduras',
				'jamaique' => 'Jamaica',
				'mexique' => 'Mexico',
				'nicaragua' => 'Nicaragua',
				'panama' => 'Panama',
				'paraguay' => 'Paraguay',
				'perou' => 'Peru',
				'saintCristopheEtNieves' => 'Saint Kitts and Nevis',
				'sainteLucie' => 'Saint Lucia',
				'saintVincentEtLesGrenadines' => 'Saint Vincent and the Grenadines',
				'salvador' => 'El Salvador',
				'suriname' => 'Suriname',
				'triniteEtTobago' => 'Trinidad and Tobago',
				'uruguay' => 'Uruguay',
				'venezuela' => 'Venezuela',
			),
			'Asia' => array(
				'afghanistan' => 'Afghanistan',
				'arabieSaoudite' => 'Saudi Arabia',
				'armenie' => 'Armenia',
				'azerbaidjan' => 'Azerbaijan',
				'bahrein' => 'Bahrain',
				'bangladesh' => 'Bengladesh',
				'bhoutan' => 'Bhutan',
				'birmanie' => 'Burma',
				'brunei' => 'Brunei',
				'cambodge' => 'Cambodia',
				'chine' => 'China',
				'coreeDuSud' => 'South Korea',
				'coreeDuNord' => 'North Korea',
				'emiratsArabeUnis' => 'United Arabe Emirates',
				'georgie' => 'Georgia',
				'inde' => 'India',
				'indonesie' => 'Indonesia',
				'iraq' => 'Iraq',
				'iran' => 'Iran',
				'israel' => 'Israel',
				'japon' => 'Japan',
				'jordanie' => 'Jordan',
				'kazakhstan' => 'Kazakhstan',
				'kirghistan' => 'Kyrgyzstan',
				'koweit' => 'Kuwait',
				'laos' => 'Laos',
				'liban' => 'Lebanon',
				'malaisie' => 'Malaysia',
				'maldives' => 'Maldives',
				'mongolie' => 'Mongolia',
				'nepal' => 'Nepal',
				'oman' => 'Oman',
				'ouzbekistan' => 'Uzbekistan',
				'pakistan' => 'Pakistan',
				'philippines' => 'Philippines',
				'qatar' => 'Qatar',
				'singapour' => 'Singapore',
				'sriLanka' => 'Sri Lanka',
				'syrie' => 'Syria',
				'tadjikistan' => 'Tajikistan',
				'taiwan' => 'Taiwan',
				'thailande' => 'Thailand',
				'timorOriental' => 'East Timor',
				'turkmenistan' => 'Turkmenistan',
				'turquie' => 'Turkey',
				'vietNam' => 'Vietnam',
				'yemen' => 'Yemen',
			),
 
			'Europe' => array(
				'allemagne' => 'Germany',
				'albanie' => 'Albania',
				'andorre' => 'Andorra',
				'autriche' => 'Austria',
				'bielorussie' => 'Belarus',
				'belgique' => 'Belgium',
				'bosnieHerzegovine' => 'Bosnia and Herzegovina',
				'bulgarie' => 'Bulgaria',
				'croatie' => 'Croatia',
				'danemark' => 'Denmark',
				'espagne' => 'Spain',
				'estonie' => 'Estonia',
				'finlande' => 'Finland',
				'france' => 'France',
				'grece' => 'Greece',
				'hongrie' => 'Hungary',
				'irlande' => 'Ireland',
				'islande' => 'Iceland',
				'italie' => 'Italy',
				'lettonie' => 'Latvia',
				'liechtenstein' => 'Liechtenstein',
				'lituanie' => 'Lithuania',
				'luxembourg' => 'Luxembourg',
				'exRepubliqueYougoslaveDeMacedoine' => 'Republic of Macedonia',
				'malte' => 'Malta',
				'moldavie' => 'Moldova',
				'monaco' => 'Monaco',
				'norvege' => 'Norway',
				'paysBas' => 'Netherlands',
				'pologne' => 'Poland',
				'portugal' => 'Portugal',
				'roumanie' => 'Romania',
				'royaumeUni' => 'United Kingdom',
				'russie' => 'Russia',
				'saintMarin' => 'San Marino',
				'serbieEtMontenegro' => 'Serbia and Montenegro',
				'slovaquie' => 'Slovakia',
				'slovenie' => 'Slovenia',
				'suede' => 'Sweden',
				'suisse' => 'Switzerland',
				'republiqueTcheque' => 'Czech Republic',
				'ukraine' => 'Ukraine',
				'vatican' => 'Vatican City',
			),
 
			'Océanie' => array(
				'australie' => 'Australia',
				'fidji' => 'Fiji',
				'kiribati' => 'Kiribati',
				'marshall' => 'Marshall',
				'micronesie' => 'Federated States of Micronesia',
				'nauru' => 'Nauru',
				'nouvelleZelande' => 'New Zealand',
				'palaos' => 'Palau',
				'papouasieNouvelleGuinee' => 'Papua new guinea',
				'salomon' => 'Salomon',
				'samoa' => 'Samoa',
				'tonga' => 'Tonga',
				'tuvalu' => 'Tuvalu',
				'vanuatu' => 'Vanuatu',
			),