ADoes anyone have a cake recipe that uses wheat flour for diabetics. I have a niece that has diabetes and I want to make a cake n frosting that she can actually eat.

If she's diabetic, then wheat flour might not work (depends on how diabetic she is). You'll need a low-carb cake, not just low sugar. Try using a different type of flour, like a nut flour. Nut flours are usually a lot drier than wheat flours so they can't be evenly substituted for regular flour.  I've only made flour-less cookies with a combination of almond and coconut flour.

Here's a thread where writer_mom gave some helpful links:
http://cakecentral.com/t/78031/low-carb-or-no-sugar-cake-recipe

Here's a few recipes that I found that might help:
http://alldayidreamaboutfood.com/2013/09/caramel-apple-coffee-cake-low-carb-and-gluten-free.html
http://satisfyingeats.blogspot.com/2012/05/best-grain-sugar-free-birthday-cake.html

This site is from an Atkins thread about birthday cakes, here's the 3-min chocolate cake recipe:
http://www.genaw.com/lowcarb/3_minute_chocolate_cake.html

Good luck and I'm sure someone on here has a tried and true recipe. :)

Yellow pea flour is another option

http://silverbulletin.utopiasilver.com/take-control-of-blood-sugar-with-yellow-pea-flour/

http://www.diabeticlivingonline.com/diabetic-recipes/dessert/our-best-diabetic-cake-recipes

http://diabeticgourmet.com/recipes/Desserts/Cakes/

http://www.pinterest.com/diabeticliving/diabetic-dessert-recipes/

AThanks for the links. I'll have to try some out.