public static function getIterator($id, $per_page = 10, $start_from_zero = true, $typ = "old", $redir_c = 1) {
        static $iterators = array();
        if (!isset($iterators[$id]) || !array_key_exists($id, $iterators) || !$iterators[$id]) {
            $iterators[$id] = new Iterator($id, $per_page, $start_from_zero, $typ, $redir_c);
        }
        return $iterators[$id];
    }