这是image_send_to_editor 过滤器：

if(is_admin()){

  add_filter(\'image_send_to_editor\', \'wrap_my_div\', 10, 8);

  function wrap_my_div($html, $id, $caption, $title, $align, $url, $size, $alt){
    return \'<div class="mydiv" id="mydiv-\'.$id.\'">\'.$html.\'</div>\';
  }
}