CI Calendar other way

Hello, community!

I have created webapp with CI - I love this framework! And now, I need to implement Calendar, that should be almost like this one: http://www.echteinfach.tv/ferien/?m=2015-11

Have anybody tried to create something like this? My head is completely blocked from understanding, how to achieve this with CI.

I don't ask to make this for me! Just point me to the right direction.

Thanks for any help!!