While the use of mobile web contents has shown a considerable increase, most of these contents, which are written in HTML format, are not convenient enough to use. Even though rich user-interfaces can be developed using some technologies like Flash Lite, it costs high because developers need to construct a whole application from scratch. Therefore, the development framework for mobile web contents which reduces the development cost is needed. In this paper, we propose a development framework for rich user-interfaces of mobile web contents. The proposed framework employs the dependency injection pattern to separate a content and its user-interface. Each userinterface component provides a functionality of a specific user-interface, and information that is specific to a particular website is described in an HTML document. A website is made by binding multiple user-interface components with an HTML document. The proposed framework provides a reduction of the development cost of mobile websites with a rich user-interface by leveragin existing resources.