A multi module MVC structure guide

Hi I'm trying to implement a Multi Module MVC for frontend and backend like what is in documentations. But I can't make it work. it's about an hour but I really can not understand where is the problem.

Could anyone guide me how can I make a skeleton for a multi module mvc for frontend and backend. what should I put in Moudle.php for frontend and backend, And also what should I put in bootstrap file located in public/index.php And any extra file or information I need.

Thanks in advanced.