Modular Extensions - HMVC

Hi guys!
I'm learning PHP from scratch, I'm a self-taught. grabbed much material from CI, for example, their libraries I learned a lot.
i don't use any framework for programming. first i want to have a solid knowledge of PHP. But the other day looking for PHP tutorials I found me with this: https://bitbucket.org/wiredesignz/codeig...sions-hmvc

Apparently many people use this extension. This makes CI is safer? Because it is used?
Hopefully you can help me because it looks interesting but as I'm still learning php not understand much. Forgive my poor English.