Preheat oven to 350 degrees. Combine cake mix and melted butter (will be crumbly). Stir in pecans. Set aside one cup of this mixture for topping. Press remaining into greased 9x13 pan. Spread marmalade over crust. Beat together cream cheese and remaining ingredients. Spread over marmalade. Sprinkle with reserved crumbs. Bake 40-45 minutes. Cool in pan. Cut and serve. Store leftovers in refrigerator.