filter for Media::encode arrays.

gistfile1.txt

Media::applyFilter('encode', function($self, $params, $chain) {
	foreach ($params['data'] as $key => $value) {
		if ($value instanceof \lithium\data\Collection) {
			$params['data'][$key] = array_values($value->to('array'));
		}
	}
	return $chain->next($self, $params, $chain);
});