Add sub-categories option for each ad?
When a user posts an ad, he is required to choose a category for his ad. What I want is aside from this major category, I want members to give optional sub-categories which they can check. With this, I can easily have a Search engine on the main board that will show all ads on a certain sub-category.
For example, for my Car Ads site, my main category is the car brand: Honda, Toyota, etc. Aside from this option, I want an optional sub-categories that a user can check for example:
Sub-Category 1: Price
- Under $xxx
- $xxx - $xxxx
- Above $xxxx
Sub-Category 2: Location
- Location 1
- Location 2
- etc.
Please tell me how I can add these optional sub-categories in the "Post Ad' page. Thanks!
