像这种的联动怎么实现调用呀?
{volist name=":fun('field@list_filter',$mid)" id="rs"}
<dl><dt>{$rs.title}:</dt><dd>
<a href='{:urls("index","fid=$fid&$rs[opt_url]")}' {if input($rs['name'])===null}class="ck"{/if}>不限</a>
{volist name="$rs.opt" id="vs"}
<a href='{:urls("index","fid=$fid&$vs[url]")}' {if input($rs['name'])==$vs['key']}class="ck"{/if}>{$vs.title}</a>
{/volist}
</dd></dl>
{/volist}
这种的就全部调出来了