#Tab{width:300px;line-height:30px;overflow:hidden;}
#Tab li{float:left;width:100px;line-height:30px;text-align:center;cursor:pointer;}
#Main{width:300px;height:300px;overflow:hidden;border:1px solid #000;}
#Main ul{height:300px;}
#Main ul li{height:30px;line-height:30px;}

<div id="Tab">
<ul>
<li><a href="#01">标签1</a></li>
<li><a href="#02">标签2</a></li>
</ul>
</div>
<div id="Main">
<ul id="01">
<li>1111111</li>
<li>1111111</li>
<li>1111111</li>
<li>1111111</li>
<li>1111111</li>
<li>1111111</li>
<li>1111111</li>
<li>1111111</li>
<li>1111111</li>
<li>1111111</li>
</ul>
<ul id="02">
<li>2222222</li>
<li>2222222</li>
<li>2222222</li>
<li>2222222</li>
<li>2222222</li>
<li>2222222</li>
<li>2222222</li>
<li>2222222</li>
<li>2222222</li>
<li>2222222</li>
</ul>
</div>