How To Go About Integrating Foundation Framework (For Front-End) Into Yii Framework (For Back-End)

I want to integrate the [b]Foundation/b front-end framework with the [b]Yii/b PHP framework for developing a web application.

Since i am new to both of them and learning to use it as i move along with the development, I am unaware as to how will i be able to use both of them for the same project.

Logically speaking i understand that the Foundation 5 directory has to put into the Yii project directory structure. But i am not sure as to which directory to use in Yii project for that.

I tried researching on the web, but since i am new i am not able to understand which is the right way to go about achieving what i intent to.

Step by step instructions to do it would be appreciated. Thanks in advance.