Sunfighter: For the life of me, I don't see the relevance of what you posted to what is shown on that "fanfiction.net" site. How does what you show relate to all those <select> dropdowns??? I quote from his first post:
if a member decide that s/he wants to view only Roses in the flower category, you can choose that in a drop-down menu and all images of roses will appear. Then s/he wants to view purple flowers so s/he clicks (in the colour drop down) the colour purple to view all images of purple roses.
And from the second post:
you can sort all the fanfiction by genre, ratings, characters, status etc.
That has nothing to do with the stuff you showed.
Perhaps the problem is that he uses the word "sort" when he really means "filter". That is, he wants to filter records so that he only gets "purple roses", for example. And of course that is properly done in the SQL query.
To be fair, I'm not sure about the relevance of "fanfiction.net" to what he is asking for. He *seems* to be asking for what I call "dependent <select>s." That is, you select a category in the first <select> and then the *CONTENTS* of the second <select> change to be subcategories of that chosen category. And then maybe this continues through various levels of subcategories.
mmaar: You need to be more specific if possible.