Social Media In Yii

I would like something similar to the PHP script here:

But I would like it developed in yii and tied to the standard User model.

It includes standard things like groups, postings, find friends, invites, walls, etc.

I do not need UI design, only basic functionality.

If you have built something like this before, I’d be interested in purchasing a copy of existing unencumbered source code for customization.

Note: I’m not interested in another framework or integration with something like Elgg.