Converting a iPad-App into a web-App

What is needed is a responsive design for resolutions between 1024x600 and 1280x800, optimized for horizontal and vertical alignment [login to view URL] shows the current iPad-App, [login to view URL] shows the changes to the new web-App. All data are available through a webservice: - In json format [login to view URL] = .... - Only to look at the php-format print_r () [login to view URL] = .... All data must be stored so that the app also works offline There are 5 supported languages. So far there are 3 customers (hospitals) with a variable number of departments, 5 modules with different number of sub-modules. The settings from the iPad will appear here as module. The login determines which hospital, which departments, how many modules and sub-modules which appear. In this project, the navigation has to be displayed correctly for all windows and the switching of languages ​​must work. The infrastructure must be modular so that new modules and sub-modules can be added without much effort.