{pc:get sql="select * from phpcms_category where catid in(你的子栏目ID)" return="data"}

{loop $data $r}

<a href="{$r['url']}">{$r['catname']}</a>

{/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)