drupal gridview drop down menu - showing all menu and sub menus under one parent I would like to show drop down menus in gridview format. ideally it should show all sub menus and sub sub menues under one parrent. any module which can service this purpose?
Maybe you could use the Superfish module? Here is a quote about it (from the module's project page):

... integrates jQuery Superfish plugin with your Drupal menus:

Unobtrusive JavaScript.
Keyboard-accessible, screen reader friendly.
Multi-column sub-menus. (Megamenus)
Easing effects with the jQuery Easing plug-in.
Automatic width calculation (sfAutomaticWidth plugin) (Use the development release)
Automatic sub-menu width calculation (Supersubs plugin), automatic sub-menu placement (Supposition plugin; prevents sub-menus from appearing off-screen.)
Touch-screen compatible. (almost)
Small-screen compatible. ( and vertical accordions)
Window width (client-side) and UA string (client-side and server-side) detection for touch and small screen plugins (no CSS3 media-queries)
RTL (Right-to-left) language support.
Plenty of built-in options for designers.
And a whole lot more...