When I try to execute the below code it gives me the error "There was an error rendering the control. Check to make sure all properties are valid". Inner repeater works fine inside the tab container. But outer does not allow to have a tab panel within it.
Tab containers are not available in asp.net toolbox and therefore I installed Ajax tool kit and added that to Visual Studio and refer that Assembly as follows.
<%@ Register Assembly="AjaxControlToolkit, Version=1.0.11119.25966, Culture=neutral,PublicKeyToken=28f01b0e84b6d53e" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<asp:Repeater ID="ProjectRepeater" runat="server">
<ItemTemplate>
<cc1:TabContainer ID="TestTabContainer" runat="server">
<cc1:TabPanel ID="TestTabPanel" HeaderText="technologies" runat="server">
<ContentTemplate>
<asp:Repeater id="SkillsRepeater" runat="server">
<ItemTemplate>
<div class="project-technologies" id="SkillZone" runat="server">
<a id="skill" href='<%# "http://vingo/Pages/projectresults.aspx?k="+DataBinder.Eval(Container.DataItem, "Skill")%>' target="_blank"><%# DataBinder.Eval(Container.DataItem, "Skill")%></a>
</div>
</ItemTemplate>
</asp:Repeater>
</ContentTemplate>
</cc1:TabPanel>
</cc1:TabContainer>
EDIT: Outer repeater code
<asp:Repeater ID="P" runat="server">
<ItemTemplate>
<cc1:TabContainer ID="TTC" runat="server">
<cc1:TabPanel ID="TTP" HeaderText="t" runat="server">
<ContentTemplate>
<asp:Repeater id="A" runat="server">
<ItemTemplate>
<%--Code--%>
</ItemTemplate>
</asp:Repeater>
</ContentTemplate>
</cc1:TabPanel>
</cc1:TabContainer>
</ItemTemplate>
</asp:Repeater>