How to display only specified columns on the phpcms homepage

The following code controls which columns are displayed through the column id, and the id is based on the actual situation For background query, see the explanation of the subcat function in the last attachment. Modify the code as follows:

{loop subcat(0,0,0,$siteid) $r}
  {if $r['catid']==1||$r['catid']==2 } //顯示哪些欄目
        {php $num++}
        <div class="box cat-area" {if $num%2!=0}style=" margin-right:10px"{/if}>
          <h5 class="title-1">{$r}<a href="{$r}" class="more">更多>></a></h5>
             <div class="content">
             {pc:content  action="lists" catid="$r" order="updatetime DESC" thumb="1" num="1" return="info"}
             {loop $info $v}
              <p>
               <img src="{thumb($v,90,0)}" width="90" height="60"/>
                    <strong><a   target="_blank" title="{$v[&#39;title&#39;]}"{title_style($v)}>{str_cut($v[&#39;title&#39;],28)}</a></strong><br />{str_cut($v[&#39;description&#39;],100)}
                </p>
              {/loop}
              {/pc}               
                <div class="bk15 hr"></div>
                {pc:content action="lists" catid="$r" num="5" order="id DESC" return="info"}
                <ul class="list lh24 f14">
                {loop $info $v}
                 <li>·<a href="{$v[&#39;url&#39;]}" target="_blank" title="{$v[&#39;title&#39;]}"{title_style($v)}>{str_cut($v[&#39;title&#39;],40)}</a></li>
                {/loop}
                </ul>
                {/pc}
            </div>
        </div>
        {if $num%2==0}<div class="bk10"></div>{/if}
  {/if}
  {/loop}

In addition to specifying specific columns, we can also use the exclusion method to display specific columns

V9 Exclusion Method of a certain column

{loop subcat(0,0,0,$siteid) $r}
          {if $r[&#39;catid&#39;]==3 }<?php continue; ?>{/if} //排除某個(gè)欄目
          {php $num++}
        <div class="box cat-area" {if $num%2!=0}style=" margin-right:10px"{/if}>
          <h5 class="title-1">{$r}<a href="{$r}" class="more">更多>></a></h5>
             <div class="content">
             {pc:content  action="lists" catid="$r" order="updatetime DESC" thumb="1" num="1" return="info"}
             {loop $info $v}
              <p>
               <img src="{thumb($v,90,0)}" width="90" height="60"/>
                    <strong><a   target="_blank" title="{$v[&#39;title&#39;]}"{title_style($v)}>{str_cut($v[&#39;title&#39;],28)}</a></strong><br />{str_cut($v[&#39;description&#39;],100)}
                </p>
              {/loop}
              {/pc}               
                <div class="bk15 hr"></div>
                {pc:content action="lists" catid="$r" num="5" order="id DESC" return="info"}
                <ul class="list lh24 f14">
                {loop $info $v}
                 <li>·<a href="{$v[&#39;url&#39;]}" target="_blank" title="{$v[&#39;title&#39;]}"{title_style($v)}>{str_cut($v[&#39;title&#39;],40)}</a></li>
                {/loop}
                </ul>
                {/pc}
            </div>
        </div>
        {if $num%2==0}<div class="bk10"></div>{/if}
  {/loop}

{loop subcat(0,0,0,$siteid) $r}{/loop}Function explanation:

/**
* 獲取子欄目 
* @param $parentid 父級(jí)id  
* @param $type 欄目類型 1為單網(wǎng)頁類型，0為欄目類型；（查看phpcms的mysql數(shù)據(jù)庫可以看到）
* @param $self 是否包含本身 0為不包含 
* @param $siteid 站點(diǎn)id 
*/ 
function subcat($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; 
}

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