全部
{empty name="$obj.type_extend.class"}
{maccms:foreach name=":explode(',',$obj.parent.type_extend.class)" id="vo2" key="key2"}
{$vo2}
{/maccms:foreach}
{else /}
{maccms:foreach name=":explode(',',$obj.type_extend.class)" id="vo2" key="key2"}
{$vo2}
{/maccms:foreach}
{/empty}