<ul class="ul_lev1 clearfix">
{eyou:models type='top' id='field1' currentstyle='cur'}
<li class="{$field1.currentstyle} li_lev1 clearfix">
<div class="navtit1">
<a class="line1" href="{$field1.typeurl}" title="">{$field1.typename} </a>
{eyou:notempty name="$field1.children"}
<i class="mob-down fa fa-angle-down" aria-hidden="true"></i>
{/eyou:notempty}
</div>
{eyou:notempty name="$field1.children" }
<ul class="dropdown-menu nav_small" role="menu">
{eyou:models type='son' name="$field1.children" id='field2' noself='yes' }
<li>
<a href="{$field2.typeurl}" title="">{$field2.typename}</a>
<ul>
{eyou:artlist loop='10' titlelen='150' infolen='160' }
<li>{$i}<a href='{$field.arcurl}'>{$field.title}</a></li>
{/eyou:artlist}
</ul>
</li>
{/eyou:models}
</ul>
{/eyou:notempty}
</li>
{/eyou:models}
</ul>