参考以下代码：
<!DOCTYPE html><html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
* {
margin: 0
padding: 0
}
#parent >li> span{background: #999999display: blockwidth: 200pxborder:1px solid #ECEEF2}
li {line-height: 40pxdisplay: block}
li p{
display: inline-block
width: 0px
height: 0px
border-left: 5px solid transparent
border-right: 5px solid transparent
border-top: 5px solid#2f2f2f
}
li>ul{display: none}
li>ul>li{border: 1px solid #DEDEDEwidth: 199px}
#parent span:hover + ul{display: block}
#parent span:hover >p{
display: inline-block
width: 0px
height: 0px
border-top: 5px solid transparent
border-bottom: 5px solid transparent
border-left: 5px solid#2f2f2f}
</style>
</head>
<body>
<ul id="parent">
<li>
<span><p></p>列表</span>
<ul>
<li>子列表</li>
<li>子列表</li>
<li>子列表</li>
</ul>
</li>
<li>
<span><p></p>列表</span>
<ul>
<li>子列表</li>
<li>子列表</li>
<li>子列表</li>
</ul>
</li>
<li>
<span><p></p>列表</span>
<ul>
<li>子列表</li>
<li>子列表</li>
<li>子列表</li>
</ul>
</li>
</ul>
</body>
</html>
<table border="0" cellspacing="0" cellpadding="0"><tr>
<td scope="row"><table border="1">
<tr>
<td id="showbfq" height="20" align="top" onclick="if(bfq.style.display=='none'){bfq.style.display=''showbfq.innerText='优质'}
else{bfq.style.display='none'showbfq.innerText='点击更多'}">点击更多</td>
</tr>
<tr>
<td height="80" align="center" name="bfq" id="bfq" style="display:none">aaa</td>
</tr>
</table></td></tr>
<tr><td><table border="1">
<tr>
<td id="showbfq1" height="20" align="top" onclick="if(bfq1.style.display=='none'){bfq1.style.display=''showbfq1.innerText='优质'}
else{bfq1.style.display='none'showbfq1.innerText='点击更多'}">点击更多</td>
</tr>
<tr>
<td height="80" align="center" name="bfq1" id="bfq1" style="display:none">bbb</td>
</tr>
</table></td></tr>
<tr><td><table border="1">
<tr>
<td id="showbfq2" height="20" align="top" onclick="if(bfq2.style.display=='none'){bfq2.style.display=''showbfq2.innerText='优质'}
else{bfq2.style.display='none'showbfq2.innerText='点击更多'}">点击更多</td>
</tr>
<tr>
<td height="80" align="center" name="bfq2" id="bfq2" style="display:none">ccc</td>
</tr>
</table></td></tr>
</table>
一样的，用一个大表格，把它们竖向的框起来。
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