dedecms遍历栏目分类，判断是否有子栏目

        <ul id="nav">
            <li class="navitem"><a class="nav-a  active " href="{dede:global.cfg_cmsurl/}" target="_self"><span
                        data-title="首页">首页</span></a></li>
            {dede:channelartlist typeid='top'}
            <li class="navitem">
                <a class="nav-a " href="{dede:field name='typeurl'/}" target="_self"><span data-title="{dede:field name='typename'/}">{dede:field
                        name='typename'/}</span>
                    {dede:field name=typeid runphp="yes"}
                    global $dsql;
                    $sql = "SELECT id From `#@__arctype` WHERE reid='@me' And ishidden<>1 order by sortrank asc limit
                        0, 100 ";
                        $row = $dsql->GetOne($sql);
                        @me=is_array($row)?'<i class="fa fa-angle-down"></i>':'';
                        {/dede:field}
                </a>
                {dede:field name=typeid runphp="yes"}
                global $dsql;
                $sql = "SELECT id From `#@__arctype` WHERE reid='@me' And ishidden<>1 order by sortrank asc limit 0,
                    100 ";
                    $row = $dsql->GetOne($sql);
                    @me=is_array($row)?'<ul class="subnav">':'';
                        {/dede:field}
                        {dede:channel type='son' noself='yes'}
                        <li><a href='[field:typelink/]' target="_self"><span data-title="[field:typename/]">[field:typename/]</span><i
                                    class="fa fa-angle-right"></i></a></li>
                        {/dede:channel}
                        {dede:field name=typeid runphp="yes"}
                        global $dsql; $sql = "SELECT id From `#@__arctype` WHERE reid='@me' And ishidden<>1 order by
                            sortrank asc limit 0, 100 ";
                            $row = $dsql->GetOne($sql);
                            @me=is_array($row)?'</ul>':'';
                    {/dede:field}
            </li>
            {/dede:channelartlist}
        </ul>