  <div class="sidebarmenu">
   <div class="sdheader">
    产品中心
   </div>
   <div class="sdcontent"> 
    <ul>
     <li><a class="sdlevel_1" href="category-2.html">平板电视<span></span></a>
      <ul class="sub">
       <li><a class="sdlevel_2" href="category-430.html">电视1</a></li>
      </ul></li>
     <li><a class="sdlevel_1" href="huawei.html">手机<span></span></a>
      <ul class="sub">
       <li><a class="sdlevel_2" href="category-5.html">华为</a></li>
       <li><a class="sdlevel_2" href="category-6.html">小米</a></li>
       <li><a class="sdlevel_2" href="category-7.html">其他</a></li>
      </ul></li>
     <li><a class="sdlevel_1" href="category-4.html">笔记本<span></span></a></li>
    </ul> 
   </div>
  </div>