{dede:channeltype typeid='typeid' runphp='yes'}
if(@list != '') {
    <ul class="submenu">
    {dede:loop value='@list'}
        <li><a href="[url]">[@typename]</a></li>
    {/dede:loop}
    </ul>
} else {
    "没有子菜单"
}
{/dede:channeltype}