OneThink-nav标签

/* 导航列表 */
    public function _nav($tag, $content){
        trace($tag);
        trace($content);
        trace("end");
        $field  = empty($tag['field']) ? 'true' : $tag['field'];
        $tree   =   empty($tag['tree'])? false : true;
        $parse  = $parse   = 'field('.$field.')->where("status=1")->order("sort")->select();';
        if($tree){
            $parse .= '$__NAV__ = list_to_tree($__NAV__, "id", "pid", "_");';
        }
        $parse .= '?>';
        $parse .= $content;
        $parse .= '';
        // trace($parse);
        return $parse;
    }

　　　使用自定义标签

                            {$nav.title}