phpcms首页如何只显示指定栏目

{loop subcat(0,0,0,$siteid) $r}
  {if $r['catid']==1||$r['catid']==2 } //显示哪些栏目
        {php $num++}
        

          
{$r}更多>>
             

             {pc:content  action="lists" catid="$r" order="updatetime DESC" thumb="1" num="1" return="info"}
             {loop $info $v}
              

               
                    {str_cut($v['title'],28)}
{str_cut($v['description'],100)}
                
              {/loop}
              {/pc}               
                

                {pc:content action="lists" catid="$r" num="5" order="id DESC" return="info"}
                

                {loop $info $v}
                 
·{str_cut($v['title'],40)}
                {/loop}
                
                {/pc}
            
        
        {if $num%2==0}
{/if}
  {/if}
  {/loop}

{loop subcat(0,0,0,$siteid) $r}
          {if $r['catid']==3 }{/if} //排除某个栏目
          {php $num++}
        

          
{$r}更多>>
             

             {pc:content  action="lists" catid="$r" order="updatetime DESC" thumb="1" num="1" return="info"}
             {loop $info $v}
              

               
                    {str_cut($v['title'],28)}
{str_cut($v['description'],100)}
                
              {/loop}
              {/pc}               
                

                {pc:content action="lists" catid="$r" num="5" order="id DESC" return="info"}
                

                {loop $info $v}
                 
·{str_cut($v['title'],40)}
                {/loop}
                
                {/pc}
            
        
        {if $num%2==0}
{/if}
  {/loop}

/**
* 获取子栏目 
* @param $parentid 父级id  
* @param $type 栏目类型 1为单网页类型，0为栏目类型；（查看phpcms的mysql数据库可以看到）
* @param $self 是否包含本身 0为不包含 
* @param $siteid 站点id 
*/ 
function subcat($parentid = NULL, $type = NULL,$self = '0', $siteid = '') { 
        if (empty($siteid)) $siteid = get_siteid(); 
        $category = getcache('category_content_'.$siteid,'commons'); 
        foreach($category as $id=>$cat) { 
                if($cat['siteid'] == $siteid && ($parentid === NULL || $cat['parentid'] == $parentid) && ($type === NULL || $cat['type'] == $type)) $subcat[$id] = $cat; 
                if($self == 1 && $cat['catid'] == $parentid && !$cat['child'])  $subcat[$id] = $cat; 
        } 
        return $subcat; 
}