您需要获取类别中已发布的帖子，然后运行wp_update_post() 插入新状态。下面是一个快速函数。我将其附加到admin init。我也会在你的状态更新后关闭它。

function wpse_55018_get_update() {
   for( $i = 0; $i < 10; $i++ ) {     // Runs this loop 10 times
       $args = array(
          \'post_status\' => \'published\',
          \'cat\'         => 23,        // Use Category ID here.
          \'posts_per_page\' => 100,    // Lets just do 100 at a time so we don\'t blow up your server
          \'no_found_rows\'  => true,   // We don\'t need to paginate.
          \'update_post_meta_cache\' => false,  // We don\'t need post meta either. 
   );
    $posts = get_posts( $args );
    if ( !$posts ) return;             // Breaks out of the function if there are no posts.
        foreach ( $posts as $post ) {
        print_r( wpse_54018_change_status( $post->ID ) );

        }
    }
}

 functionwpse_54018_change_status( $post_id ) {
    $updated_post = array();
    $updated_post[\'ID\'] = (int) $post_id;
    $updated_post[\'post_status\'] = \'draft\';

    wp_update_post( $updated_post );
        return $post_id .\' Has been Updated\';
    }


add_action( \'admin_init\', \'wpse55018_get_update\' );  This will run the next an admin page is loaded.