织梦导航菜单判断是否有子栏目，有则显示否则

我们在使用织梦cms调用二级菜单的时候，会遇到这样的问题，如果有子栏目，就显示二级菜单，如果没有就不显示，下面给出代码：

1. {dede:channelartlist row=8 typeid='1,2,3,4,5'}
2. <li class="tab dropdown">
3. <a href="{dede:field.typeurl/}" class="tablink arwlink" title="{dede:field.typename/}">{dede:field.typename/}</a>
4. {dede:field name=typeid runphp="yes"}
5. global $dsql; $sql = "SELECT id From `dede_arctype` WHERE reid='@me' And ishidden<>1 order by sortrank asc limit 0, 100 ";
6. $row = $dsql->GetOne($sql);
7. @me=is_array($row)?'<ul class="subnav">':'';
8. {/dede:field}
9.  
10. {dede:channel type='son' noself='yes' }
11. <a href="[field:typeurl/]">[field:typename/]</a>
12. {/dede:channel}
13.  
14. {dede:field name=typeid runphp="yes"}
15. global $dsql; $sql = "SELECT id From `dede_arctype` WHERE reid='@me' And ishidden<>1 order by sortrank asc limit 0, 100 ";
16. $row = $dsql->GetOne($sql);
17. @me=is_array($row)?'</ul>':'';
18. {/dede:field}
19. </li>
20. {/dede:channelartlist}