Help Regarding Yii And Backbone.

Yii is awesome, and backbone too? i want to use both in my next project. but i never want to heavily dependent on javascript, can't loose seo etc.?
So how i can make a app where i declare all url rules in one place, all same template, same models? and make its effect automatic in backbone?
so website can work without js (Not all functionality but almost every page)?

i search a lot for good php and backbone related libs and stuffs? but cat't find much?

i just want to know what do use in this kind of apps and want know your experiences and suggestions and if any good stuffs related to this?