Hello Menucha Greenhut,
The easiest way to achieve this is to edit the item template in Blend. Could you please examine the attached project and if you have any further questions feel free to ask.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items