Script Name : Rig_groups.mel
Version : 1.0
Install:Copy the "Rig_groups.mel" to your local user/ Maya scriptsdirectory ( MyDocuments\maya\version\scripts\)
Then just source the script in the script editor and save it in Shelf.
Here some screenshot images.

You can download the script from this links:
CreativeCrash : http://www.creativecrash.com/maya/script/rig-groups
Github : https://github.com/sabarishwar/Maya-Mel
Download and Enjoy.Happy Rigging !!
Hope u guys find it usefull.