ehynds/jquery-ui-multiselect-widget — pull request #245 by doits (2012-04-14 11:03:38+00:00)
Title: Group different <optgroup>s in different lists

This allows more custom layouts, like multiColumn-lists.

![screencap](http://s14.directupload.net/images/120414/r2qjllk2.png)

There's some additional css needed for multiColumn-lists, but I could provide it if you want it as a feature of this plugin.

This pull-request just lays the ground work and changes things internally, without (hopefully) changing the behavior.

If you consider this valid and mergable, I'll write some test cases.