function bsa_sortable_callback()
{
    if ($_POST && isset($_POST['bsa_order'])) {
        $ads = $_POST['bsa_order'];
        $model = new BSA_PRO_Model();
        foreach ($ads as $key => $ad) {
            $model->changeAdPriority($ad, count($ads) - $key);
        }
    }
    die;
}