I haven't used it in a while, but you should be able to change the local axis of your shell elements as you wish by selecting them, then Assign > Area > Local axis, then check the 'Advanced' option. When you're in that screen, press F1 to read about your options. Let us know how this works out.
I already do that, but I couldn´t find a option there that follow the curve, I tried to used vectors options but i don´t no how to used them very well.......
I wish I had a drawing of your problem. If I draw a curve in SAP and extrude it into areas/walls, which creates a curved wall, the local axes of the areas follows the curve by default. I'm probably misunderstanding your situation. If you have more details, I will try and dig into it, as I want to learn more myself.
