I am a personal shopper and have worked with women in your situation (curvy going from plus sizes to regular sizes). Most of the big chain stores make a 'curvy' jean, but some are curvier than others. I think Ann Taylor Loft's jeans have the biggest difference between hips and waist. We have also had luck at Eddie Bauer. Lee is good too.
There is a brand called Little in the Middle. I haven't tried them, but their website gives a lot of detail. I keep thinking I will try them with my next very curvy client.
Keep in mind tailoring too. Buying a size for your hips and taking it in at your waist, may save you time and headaches. This 'fix' should only run around $10.
If you do some shopping, here are a few deals going on:
Ann Taylor Loft: Buy one jean, get the second pair 50% off.
Gap & Old Navy: Gap's Get & Give coupon going on this weekend. Do a search or visit my website for the link.
Levi's:40% off sale today.
Good Luck! H. (hillarygorman.com)