title: wordpress-menus like multi-level menus
body: <p>You must know WP 3's multi-level menu configuration feature on the dashboard.</p>
  
  <p>I was wondering how WordPress is doing that. Yes, I know they are using jQuery UI. But still, how? Is there any documentation?</p>
  
  <p>Or is there any plugin or anything that shall help me?</p>
  
  <p>Thank you all.</p>
  
  <p><img src="https://i.stack.imgur.com/mj2Ip.png" alt="alt text"></p>