求助各位高手，怎么样用discuz x2实现类似团购网站的城市切换

想做个论坛，但要包含几个小城市，然后群组和家园为公用板块，类似团购网站的模式，请教各位高手怎样用discuz x2 实现，要改哪里的代码？

支持一下

顶。。。。。。。

<!--城市切换 QQ719468490-->
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<div id="city">
<dl id="warpper">
<dt onMouseOver="changeMenu(this,0);">[去其他县市]</dt>
<dd id="c1" class="none">
<ul>
<li><a href="forum-358-1.html">遂平</a> <a href="forum-360-1.html">西平</a> <a href="forum-361-1.html">上蔡</a> <a href="forum-364-1.html">汝南</a> <a href="forum-365-1.html">平舆</a> <a href="forum-365-1.html">新蔡</a> <a href="forum-365-1.html">正阳</a> <a href="forum-368-1.html">确山</a> <a href="forum-365-1.html">泌阳</a>
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<!--城市切换_结束QQ719468490-->