织梦导航循环指定栏目出现 rel=＂nofollow＂的方法

{dede:channel type='top' row='8'}<a href="[field:typelink/]" [field:id runphp=yes]     if(@me == 1){   @me = 'rel="nofollow"';   }else if(@me == 9){    @me = 'rel="nofollow"';   }else if(@me == 5){    @me = 'rel="nofollow"';   }else if(@me == 8){    @me = 'rel="nofollow" ';   }else if(@me == 7){    @me = 'rel="nofollow"';   }else{@me = '';}   [/field:id]  >[field:typename/]</a>{/dede:channel}

function is_nofollow($id){    switch ($id) {      case '1':         $nofollow = 'rel="nofollow"';        break;      case '2':         $nofollow = 'rel="nofollow"';        break;      case '3':         $nofollow = 'rel="nofollow"';        break;      case '4':         $nofollow = 'rel="nofollow"';        break;      default:         $nofollow = '';        break;    }    return $nofollow;}