如果您引用的是默认的自定义字段，则没有明确提及。如果是，则以下解决方案不适用。

但是，比默认设置好得多的是创建一个自定义元框，在其中显示自定义字段。

法典中有一个例子Function_Reference/add_meta_box.
这些也很有用：

• add meta box - custom field : which to choose?
• How to add option box in "Edit Post" plugin API?

  add_action( \'add_meta_boxes\', \'add_meta_box_wpse_75963\' );
  
  function add_meta_box_wpse_75963() 
  {
      // This prevents the code from going further if not in the correct post type
      global $post;
      if( \'reviews\' != $post->post_type )
          return;
  
      // Check if the other post type has a post with the same title
      // If it doesn\'t, bail out
      $other_page = get_page_by_title( $post->post_title, OBJECT, \'guides\' );
      if( !$other_page )
          return;
  
      // We are in the correct post_type (reviews)
      // and there is another post in "guides" with the same title
      add_meta_box(
          \'wpse_42440_sectionid\',
          __( \'Custom Field\' ), 
          \'display_meta_box_wpse_75963\',
          \'reviews\'
      );
  }
  
  function display_meta_box_wpse_75963() 
  { 
      echo "Insert custom field procedures here.";
      echo "Also create the appropriate <code>add_action( \'save_post\', \'callback\');</code>";
  }