how to make previous and next button on dynamic tab menus header text in ajax tabconainer?

I have created a tabcontainer and it has got tabpanel for each customer's details. On the tab menu, it displays the first name of the customer and it adds dynamically when user entered customer's info. But the problem here is if I keep added and when it reached to the end of the tabcontainer, next person goes to the second line and another menu appears. Here is the screenshot below.

Instead of the another line, I would like to make a previous and next button on each side so users can input as much as they can.

Thanks