Create 'Item Category Code' available as source for PO TAB (Purchasing)

Summary:

There is a similar question with this requirement by my scenario is different. As the Purchasing Catalog is unique wi have 5 companies with very different purposes so they usse different category names. There are some categories that are shareds with some other companies so in the category name wi use the same name but category code is different.

Saying that, we need to have Item Category Code so that we can map category code with account segment. If we use category name, we will have repeated values (with different IDs) but same names and its not possible to chose the correct one. That is why we need to have categry code source.