[6] => Array
(
[id] => 94878
[from_id] => -130914885
[to_id] => -130914885
[date] => 1511306100
[marked_as_ads] => 0
[post_type] => post
[text] =>
[media] => Array
(
[type] => photo
[owner_id] => -130914885
[item_id] => 456263394
[thumb_src] => https://pp.userapi.com/c834203/v834203665/3226b/qUJS4_PxUcg.jpg
)
[attachment] => Array
(
[type] => photo
[photo] => Array
(
[pid] => 456263394
[aid] => -7
[owner_id] => -130914885
[user_id] => 100
[src] => https://pp.userapi.com/c834203/v834203665/3226b/qUJS4_PxUcg.jpg
[src_big] => https://pp.userapi.com/c834203/v834203665/3226c/r6SWjOIlxvA.jpg
[src_small] => https://pp.userapi.com/c834203/v834203665/3226a/VkaT3RtykaI.jpg
[src_xbig] => https://pp.userapi.com/c834203/v834203665/3226d/ztbnP4CWsfk.jpg
[src_xxbig] => https://pp.userapi.com/c834203/v834203665/3226e/N4H3wmowKZo.jpg
[width] => 960
[height] => 720
[text] =>
[created] => 1511293337
[post_id] => 94878
[access_key] => 4d2cb7ab4a2f23d5dd
)
)
[attachments] => Array
(
[0] => Array
(
[type] => photo
[photo] => Array
(
[pid] => 456263394
[aid] => -7
[owner_id] => -130914885
[user_id] => 100
[src] => https://pp.userapi.com/c834203/v834203665/3226b/qUJS4_PxUcg.jpg
[src_big] => https://pp.userapi.com/c834203/v834203665/3226c/r6SWjOIlxvA.jpg
[src_small] => https://pp.userapi.com/c834203/v834203665/3226a/VkaT3RtykaI.jpg
[src_xbig] => https://pp.userapi.com/c834203/v834203665/3226d/ztbnP4CWsfk.jpg
[src_xxbig] => https://pp.userapi.com/c834203/v834203665/3226e/N4H3wmowKZo.jpg
[width] => 960
[height] => 720
[text] =>
[created] => 1511293337
[post_id] => 94878
[access_key] => 4d2cb7ab4a2f23d5dd
)
)
)
[post_source] => Array
(
[type] => vk
)
[comments] => Array
(
[count] => 0
[can_post] => 1
)
[likes] => Array
(
[count] => 181
[user_likes] => 0
[can_like] => 1
[can_publish] => 1
)
[reposts] => Array
(
[count] => 4
[user_reposted] => 0
)
[online] => 0
[reply_count] => 0
)
$data = []; // здесь ваш массив
usort($data, function ($a, $b) {
return $a['likes']['count'] - $b['likes']['count'];
});
print_r($data);