Hello Shawn Davis,
The blank attribute is added to a head link, but not to the NavigateUrl property of the Navigation control you use. All Navigation controls have NavigateUrl property where you can set Target attribute. You can do this inside ItemDataBound event of the navigation control where you can access all objects.
All the best,
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