{eyou:channel type="first" id="field" currentstyle="hover"}
<ul class="一级">
<li class="{$field.currentstyle}"><a href="{$field.typeurl}">{$field.typename}</a>
<!--一级名称   -->
{eyou:notempty name="$field.children"}
<ul class="二级">
eyou:channel name="$field.children" row="100" id="field2"}
<li><a href="{$field2.typeurl}">{$field2.typename}</a><li>
{/eyou:channel} 
</ul>
{/eyou:notempty}
</li>
</ul>
{/eyou:channel}