The Cute Menu Drupal Module is used to create advanced dropdown menus. The module is free and can be found on the Drupal website.
The list of items can be grouped under a title. The title is a menu entry which cannot be clicked on.
The dropdown panes can include a header and a footer with images and text.
Note that to make full use of the Cute Menu capabilities, you will be required to write your own CSS to make it look the way you want it to look in your theme.