Kohana：尝试动态更改内容（而不是整个页面）

I am struggling to get my head around this since too many hours and I need some help.:) I have a website build on Kohana and want to dynamically change the content of some text when the user click one button or and another. Not sure if I am doing it the right way but this what I did so far (ho by the way I am new to this framework).I am struggling to get my head around this sinc