how can i fix my cupboard door colour lifted?

Small bottle methylated spirit lint free cloth
Beechwood wood stain /dye fine sand/glass paper.
If they are Beechwood doors on a carcase of malamine then unfortunately it's a direct hit no chance to test match.
Clean surface with the meths allow to dry gently rub down with fine sandpaper. Clean off with Meths allow to dry then wipe small amount of dye/stain onto the patch allow each coat to dry build up to correct colour or near as possible, when last coat dry wipe over surface to remove the surplus dye/stain that hasn't sunk into the timber.

Bob
February 2010