For this need remove from mantis_bug_table category field, add new table mantis_bug_category_table (id, bug_id, category_id).

lilian

As an interim fix, you could try using the tagging system. Multiple category support isn't a quick and easy change.

i think tagging is the way to go. you can even remove all categories and use tagging entirely.

I think tagging does not replace for the need of multiple categories.
If we have an issue regarding a common used component I would like to have one issue for the 5 components and not 5 issues with one component.
So I can see, if the problem is solved in one place.
Also the notification is triggered by category. So every developer gets the info thru his category.
If we would use tags instead we have the request for notification by tags as result.

Between categories, sub-projects (which I'm not a fan of), and tags. I think that ought to be enough.