Use wp_list_categories
with the taxonomy argument, it is built to create hierarchal category lists but it will also support using a custom taxonomy.
Example:
using this you can see their hierarchal structure.
let me know the result
Use wp_list_categories
with the taxonomy argument, it is built to create hierarchal category lists but it will also support using a custom taxonomy.
using this you can see their hierarchal structure.
let me know the result