Drop-down menu with short description like: (a)text1(br)(span)text2(/span)(/a)'

Hi all, I was wondering if there is a non-complicated way to create a WP drop-down menu that visually kind of resembles https://GoDaddy.com menu, but it does not have to be as complex. All I would like to make the following structure for only ONE of my columns, leave the rest regular one-line links. Here is what I would like to do for that ONE column:

…

<ul id="menu">
 <li class="menu-first-level">
  <ul id="sub-menu">
   <li class="menu-second-level"><a href="#">Product Name 1
    <br>
    <span>Short Description of a Product 1</span></a></li>
   <li class="menu-second-level"><a href="#">Product Name 2
    <br>
    <span>Short Description of a Product 2</span></a></li>
  </ul>
 </li>
 </ul>

…
Please ignore all the class names, they are for explanation purposes only. I have the CSS and JQuery parts for this layout set up. However, I cannot figure out how to stick it in WordPress menu. Just spent hours digging and everything I find has <a><span>link</span></a> structure.

Mucho thanks in advance! =)