public function deleteChildMenu($menu_child_id)
    {
        $this->db->query("DELETE FROM `" . DB_PREFIX . "menu_child` WHERE menu_child_id = '" . (int)$menu_child_id . "'");
        $this->db->query("DELETE FROM `" . DB_PREFIX . "menu_child_description` WHERE menu_child_id = '" . (int)$menu_child_id . "'");
        $this->db->query("DELETE FROM `" . DB_PREFIX . "menu_child_to_store` WHERE menu_child_id = '" . (int)$menu_child_id . "'");