if($typeids[$i]['id'] == $refObj->TypeLink->TypeInfos['id'] || $typeids[$i]['id'] == $refObj->TypeLink->TypeInfos['reid'] || $typeids[$i]['id'] == $refObj->TypeLink->TypeInfos['topid'] || $typeids[$i]['id'] == GetTopid($refObj->TypeLink->TypeInfos['id']) )
{
	$pv->Fields['currentstyle'] = $currentstyle ? $currentstyle : 'current';
}
else
{
	$pv->Fields['currentstyle'] = '';
}

<div class="nav">
    <ul>
        {dede:channelartlist row=7 typeid=top currentstyle=current}
        <li class="{dede:field.currentstyle/}">
            <a href="{dede:field.typeurl/}">{dede:field.typename/}</a>
            <ul>
                {dede:channel type='son' noself='yes' row='10' currentstyle="<li class='hover'><a href='~typelink~'>~typename~</a></li>"}
                <li><a href="[field:typeurl/]">[field:typename/]</a></li>
                {/dede:channel}
            </ul>
        </li>
        {/dede:channelartlist}
    </ul>
</div>