If you are new to using forums you may find it helpful to Google for and review basic forum etiquette. It will likely improve the number and quality of responses you get. Posts like this are not likely to get much of a response. The amount of help other people can provide to you is limited by the amount of detail provided, and this post has very little.
I am using Ajax's tab container controll
AJAX is just a communication mechanism. It does not have a tab controller that I am aware of. I am assuming you are using a third party library to get this "tab container controller" feature. If that is the case we would need to know which one, and details on how it is being used.
my problem is that when i puts this tab container into update panel the format gets changed means
What update panel? What gets changed? How is it changed?
so where is the problem in my page ???
What page? It is generally not very productive to ask for help debugging your code if you are not going to post that code. Also please use code tags when posting code.