查询显示问题，急急急。
<table><tr><td><!--标签开始--><table><tr><td><img src="images/arrow.png"><b>开关面板</b></td></tr><tr><td valign=top><a href="html/kaiguan/232122873.html" target="_blank">西蒙开关</a> | <a href="html/kaiguan/201337580.html" target="_blank">西门子开关</a> | <a href="html/kaiguan/122849560.html" target="_blank">松下开关</a> | <a href="html/kaiguan/234940691.html" target="_blank">梅兰日兰开关</a> | <a href="html/kaiguan/234928276.html" target="_blank">奇胜开关</a> | <a href="html/kaiguan/123203146.html" target="_blank">梅兰日兰弱电箱</a> | <a href="html/kaiguan/22143244.html" target="_blank">禾田信息箱</a> | </td></tr></table><!--标签结束-->
</td><td>
<!--标签开始--><table><tr><td><img src="images/arrow.png"><b>卫浴洁具</b></td></tr><tr><td valign=top><a href="html/weiyu/102434379.html" target="_blank">美加华卫浴</a> | <a href="html/weiyu/153745956.html" target="_blank">帝王洁具</a> | <a href="html/weiyu/152933689.html" target="_blank">惠达洁具</a> | <a href="html/weiyu/232036218.html" target="_blank">科勒卫浴</a> | <a href="html/weiyu/221521245.html" target="_blank">TOTO卫浴</a> | <a href="html/weiyu/205316142.html" target="_blank">东鹏洁具</a> | <a href="html/weiyu/205304918.html" target="_blank">乐家卫浴</a> | <a href="html/weiyu/102740798.html" target="_blank">梵恩卫浴挂件</a> | <a href="html/weiyu/205240339.html" target="_blank">雅鼎卫浴五金</a> | </td></tr></table><!--标签结束-->
</td><td>
<!--标签开始--><table><tr><td><img src="images/arrow.png"><b>卫浴洁具</b></td></tr><tr><td valign=top><a href="html/weiyu/102434379.html" target="_blank">美加华卫浴</a> | <a href="html/weiyu/153745956.html" target="_blank">帝王洁具</a> | <a href="html/weiyu/152933689.html" target="_blank">惠达洁具</a> | <a href="html/weiyu/232036218.html" target="_blank">科勒卫浴</a> | <a href="html/weiyu/221521245.html" target="_blank">TOTO卫浴</a> | <a href="html/weiyu/205316142.html" target="_blank">东鹏洁具</a> | <a href="html/weiyu/205304918.html" target="_blank">乐家卫浴</a> | <a href="html/weiyu/102740798.html" target="_blank">梵恩卫浴挂件</a> | <a href="html/weiyu/205240339.html" target="_blank">雅鼎卫浴五金</a> | </td></tr></table><!--标签结束-->
</td></tr></table>
大家帮忙看看这样的列表，我的循环语句咋的写才可以实现这样的效果啊？
每行有三个类别，一共有多少行未知，因为后台可以添加类别。高人帮忙，看看啊。急啊
