None ? Depending on degree, it's either that, pills, perhaps (if it isn't severe) or ignoring it (not a good idea, probably). Maybe you can look into a pancreas transplant or other experimental treatment, once those come full circle.
Do you have an insulin pump? I plan to get one, as the needling is by far the worst part (mere carb counting is just annoying, not bang-head-against-the-wall annoying).
As an aside, CF diabetes is one of the worst pains in the butt this illness can give you. (Other than, perhaps, a literal pain in the butt from CF-related arthritis.) <img src="i/expressions/face-icon-small-smile.gif" border="0">