Adding 'Request Category' Form

[AlxAgency]

I'm working on a business listing website using a Wordpress theme as the framework.

Unfortunately, there is a limited number of categories with no option for a user to request a category. Below you can see an image of the form that users utilize to create a listing.

http://postimg.org/image/5r8scqh8f/

 

Here is the relevant code related to that section:
 

function aitDirItemTaxonomies() {

	register_taxonomy( 'ait-dir-item-category', array( 'ait-dir-item' ), array(
		'hierarchical' => true,
		'labels' => array(
			'name'			=> 'Item Categories',
			'singular_name' => _x( 'Category', 'taxonomy singular name', 'ait'),
			'search_items'	=> __( 'Search Category', 'ait'),
			'all_items'		=> __( 'All Categories', 'ait'),
			'parent_item'	=> __( 'Parent Category', 'ait'),
			'parent_item_colon' => __( 'Parent Category:', 'ait'),
			'edit_item'		=> __( 'Edit Category', 'ait'),
			'update_item'	=> __( 'Update Category', 'ait'),
			'add_new_item'	=> __( 'Add New Category', 'ait'),
			'new_item_name' => __( 'New Category Name', 'ait'),
		),
		'show_ui' => true,
		'rewrite' => array( 'slug' => 'cat' ),
		'capabilities' => array(
				'assign_terms' => 'assign_dir_category'
			)
	));


	register_taxonomy( 'ait-dir-item-location', array( 'ait-dir-item' ), array(
		'hierarchical' => true,
		'labels' => array(
			'name'			=> 'Item Locations',
			'singular_name' => _x( 'Location', 'taxonomy singular name', 'ait'),
			'search_items'	=> __( 'Search Location', 'ait'),
			'all_items'		=> __( 'All Locations', 'ait'),
			'parent_item'	=> __( 'Parent Location', 'ait'),
			'parent_item_colon' => __( 'Parent Location:', 'ait'),
			'edit_item'		=> __( 'Edit Location', 'ait'),
			'update_item'	=> __( 'Update Location', 'ait'),
			'add_new_item'	=> __( 'Add New Location', 'ait'),
			'new_item_name' => __( 'New Location Name', 'ait'),
		),
		'show_ui' => true,
		'rewrite' => array( 'slug' => 'loc' ),
		'capabilities' => array(
				'assign_terms' => 'assign_dir_location'
			)
	));

}
add_action( 'init', 'aitDirItemPostType');

Website: http://reliablist.com

 

 

I have made multiple attempts to try to create a 'Request a Category' button, but unfortunately have been defeated by my lack of experience.

If I could get help in any direction, it would be greatly appreciated.