使用此代码解决您的问题。

function custom_help() {
    global $post_ID;
    $screen = get_current_screen();

    if( isset($_GET[\'post_type\']) ) $post_type = $_GET[\'post_type\'];
    else $post_type = get_post_type( $post_ID );

    if( $post_type == \'listing\' ) :

    $screen->add_help_tab( array(
        \'id\' => \'you_custom_id\', // unique id for the tab
        \'title\' => \'Custom Help\', // unique visible title for the tab
        \'content\' => \'<h3>Help Title</h3><p>Help content</p>\', //actual help text
    ));

    $screen->add_help_tab( array(
        \'id\' => \'you_custom_id_2\', // unique id for the second tab
        \'title\' => \'Custom Help 2\', // unique visible title for the second tab
        \'content\' => \'<h3>Help Title 2</h3><p>Help content</p>\', //actual help text
    ));

    endif;

}

add_action(\'admin_head\', \'custom_help\');

此处介绍的添加帮助选项卡的方法Edit dashboard\'s help tab 只要编辑CustomPostType功能（列表管理屏幕）出现在CustomPostType功能（编辑/添加新管理屏幕）之前，也适用于自定义帖子类型。对于自定义post类型分类法，请使用edit taxonomyName。干杯

昨天在本教程中，我碰巧遇到了这个答案：

• Complete Guide: Custom Post Types.

  上下文帮助功能是一个降序选项卡，可以在可用页面的右上角看到。让我们看看如何更改内容。

  function my_contextual_help( $contextual_help, $screen_id, $screen ) { 
      if ( \'product\' == $screen->id ) {
  
          $contextual_help = \'<h2>Products</h2>
          <p>Products show the details of the items that we sell on the website. You can see a list of them on this page in reverse chronological order - the latest one we added is first.</p> 
          <p>You can view/edit the details of each product by clicking on its name, or you can perform bulk actions using the dropdown menu and selecting multiple items.</p>\';
  
      } elseif ( \'edit-product\' == $screen->id ) {
  
          $contextual_help = \'<h2>Editing products</h2>
          <p>This page allows you to view/modify product details. Please make sure to fill out the available boxes with the appropriate details (product image, price, brand) and <strong>not</strong> add these details to the product description.</p>\';
  
      }
      return $contextual_help;
  }
  add_action( \'contextual_help\', \'my_contextual_help\', 10, 3 );
  

  上述代码将根据screen->id, 当您只想在特定的管理页面或CPT中显示帮助选项卡时，这一点很重要，只需针对CPT中的slug。