Typecho 我需要在sidebar.php实现如下导航效果，请问如何操作？谢谢

          <strong>分类一</strong>
          <ul>
            <li><a>文章标题1</a></li>
            <li><a>文章标题2</a></li>
          </ul>
          <strong>分类二</strong>
          <ul>
            <li><a>文章标题3</a></li>
            <li><a>文章标题4</a></li>
          </ul>

---

$obj = $this->widget('Widget_Metas_Category_List');
if($obj->have()){
    while($obj->next()){
        echo '<strong>'.$obj->name.'</strong>';
        echo '<ul>';
        $this->widget('Widget_Archive@'.$obj->name, 'type=category', 'mid='.$obj->mid)->to($categoryPosts);
        while ($categoryPosts->next()) {
            echo '<li>'.$categoryPosts->title.'</li>';
        }
        echo '</ul>';

    }
}else{
    echo '无分类';
}