{eyou:type typeid='$eyou.field.typeid' id='field1'}
{eyou:eq name='$field1.parent_id' value='$field.id'}
{eyou:assign name='$field.currentstyle' value='cur' /}
{/eyou:eq}
{/eyou:type}
<div class="n_nav">
{eyou:models type="first" id="field2" currentstyle="on"}
<a class="{$field2.currentclass}" href="{$field2.typeurl}">{$field2.typename}</a>
{/eyou:models}
</div>
