I finally decided not to simplify my task, but to put all the weight on MySQl and do the following:
I am writing a message board. I decided to go a little nontrivial way.
Share everything related to the so-called. a flea market (offers to individuals on the sale, purchase and exchange of various trash) into several main sections.
I got a separate list of headings: Computers, laptops, PDAs, hats, beds, stands, consumables, computer desks, etc.
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I connected this case with another tablet of links. Allowed to attach, for example, computer desks to headings, PC, Office World, Furniture, etc.
Ad units decided to attach not to specific headings, but to link identifiers;). Woo ... Now submitting an ad, the user is invited to publish it in various sections, but in the selected category.
If anyone is interested:
dumb picture
Now submitting an advertisement for the sale of a computer desk, the user is invited to publish it not only in the “Computers” section, but also in the “Office World”, as well as in the “Furniture” section.
PS dated 1/16/2007.
Test board version
http://board.bigstreet.ru