tabs, forms, submitbuton problem

I am using Kartik tabs to organise my form into multiple forms. For that I divided my form into 3 views where each view represent a tab and contains a part of my form. My problem is that the submitbutton can get the data only from one form and not from all the forms.

Can any one give me a simple exemple to help me?

Here I post the kartik tabs link where I have installed it:

Thank you