If you want to work with a Postback, just add n RadioButtons and Build n ASCX Controls and load them in the RadioButtonClick event.
if you want to work without a Postback, u can use javascript to load all Tabs at once and just set the Visible Style or use AJAX to Load the Controls afterwards.
There are Complete Solution for this, i.e. the jQuery UI or the AJAX Toolkit.
Here are the Links:
http://jqueryui.com/demos/tabs/[
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http://www.asp.net/ajaxlibrary/AjaxControlToolkitSampleSite/Tabs/Tabs.aspx[
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