Stir together the barbecue sauce, marmalade and horseradish for basting sauce.
Place kabobs on grill over medium hot coals or medium high heat; brush generously with basting sauce. Grill and turn to evenly brown, brushing frequently with additional basting sauce until done, about 10 to 12 minutes.
*If using bamboo skewers, soak in water for 30 minutes before using to prevent burning
Kabobs can be cooked inside on the oven broil setting. Follow the same directions for basting, turning and additional basting so the kabobs brown evenly.