listing unique entires in database

how would i go about creating accessible folders

at moment i have data in single table in database

i would ideally want a system that lists all categories (by using folders or otherwise)

and then enable user to either open addto delete edit each folder


could i create a column called categories and then call all unique entries....
or should i create a new table for each category and then call each table.. but then id have too many tables.....

any help?

You'd need MPTT (http://www.philbrodeur.com/tutorials/mptt/) to stroe the folders in a tree structure.