function get_category_seo($category_id = null)
    {
        global $result_myseo;

        $cats = array();

        do {
            foreach ($result_myseo as $rm) {
                if ($rm['id'] == $category_id) {
                    $cats[] = $rm['seo_url'];
                    $category_id = $rm['parent_id'];
                }
            }
        } while (!empty($category_id)); // $category_id != 0

        return implode("/", array_reverse($cats));
    }
}