Используйте этот метод Facebook API
https://api.facebook.com/method/fql.query?query=select total_count,like_count,comment_count,share_count,click_count from link_stat where url='http://www.google.com/'&format=json
Результат:
[{"total_count":5328613,"like_count":934962,"comment_count":969801,"share_count":3423850,"click_count":265614}]
.
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $call);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$output = curl_exec($ch);
curl_close($ch);
return json_decode($output);
}
$fb_likes = reset( get_fb_likes("http://www.cnn.com") );
echo $fb_likes->total_count;
echo $fb_likes->like_count;
echo $fb_likes->comment_count;
echo $fb_likes->share_count;
echo $fb_likes->click_count;
?>
через http://halgatewood.com/get-number-of-facebook-likes-for-a-url/