Here’s the scenario: I’m using WordPress categories as states and child-categories as cities. On the front-end part, i’m showing a <select> through wp_dropdown_categories with the states only.
Is it possible to, when i change the state, it creates another <select> tag below with the subcategories to it’s relative parent?
Yes, it is. You can do it by make an ajax request when state selected, get all child categories of state and fill it in city select box.