I am not quite sure about your requirement. Check the following help documentation which explains how to set RadSplitter in CollapsingMode. Collapsing Panes.
Please elaborate your scenario if it doesn't help.
Thanks,
Shinu.
Please refer the link.
http://demos.telerik.com/aspnet-ajax/panelbar/examples/populatingwithdata/dynamiccreation/defaultcs.aspx
i want to bind the radgrid here .
//My design part i want bind the radgrid how't possible