Ionic hybrid app help guide request

I am trying to build my personal hybrid app with ionic. This app should get content from internet even menu Items, and item’s content. I mean this app should be able to show in offline and online mode.
Could you possibly guide me?

I tried to get feeds from website i tried wordpress it seems it is better than personally implemented website but I don’t know is drupal more better than WP or not. actually reading data via json api request is nothing hard but filtering data in categories is not working correctly in Ionic or better to say I Don’t know how to do that.