哪位大神帮我下，我想实现一级栏目切换并多项选择二级栏目 现在写成这样，切换不了，不知道怎么写了

  <div class="sy_menuCate mb10">
     <ul>
          {category module=services pid=0 return=c1}
    <li><a href="javascript:;"><img src="{dr_thumb($c1.thumb,100,100)}" width="70" height="70"><p>{$c1.name}</p></a></li>
 
{/category}

   {list action=category pid=$c1.id return=c2}
                                                           <ul class="brandc">

                                                        <table width="100%" border="0" cellspacing="2" cellpadding="2">
                                                              <tbody>
                                                                  <tr>
                                                                            <td width="50%" rowspan="2" align="center"><a href="{$t.url}">
                                                                                                    <img src="{dr_thumb($c2.thumb,70,50)}" width="70" height="50"></a></td>
                                                                            <td width="50%" height="48"><a href="{$c2.url}"><strong><h2>{$c2.name}</h2></strong></a></td>
                                                                  </tr>
                                                                            <tr></tr>
                                                              </tbody>
                                                        </table>
                                                     </ul>
    {/list}

</ul>
       </div>