phpcms 列表页中，如何调用其下的所有子栏目？

 {pc:content action="category" catid="$catid" num="99" order="listorder ASC"}{loop $data $cat}{pc:content  action="lists" catid="$cat['catid']" order="id DESC" num="6" return="subcate"}{if $subcate}

{$cat['catname']}

    {loop $subcate $r}    
• {date('Y/m/d H:i',$r['inputtime'])}{$r['title']}
    {/loop}

{/if}{/pc}{/loop}{/pc}或者{pc:get sql="select * from phpcms_category where catid in(你的子栏目ID)" return="data"}{loop $data $r}{$r['catname']}{/loop}  {/pc}如果你的子栏目ID是8,9,10的话，条件哪里就写成in(8,9,10)