Mobile website in Yii

I have a project which requires to have a mobile website. it is necessary to create a ProductMobileController or only ProductController. can you suggest a directory structure for mobile website for views and controller. on the latter part of the project, it will be a subdomain like,

Your best bet is to use a module. Check out the guide.

I guess it depends on what you want to achieve. We recently did this on a small campaign site where the same functionality on mobile and web. We used themes to deliver the different styles.