I had a situation where I wanted to use categories for different sorts of reviews, but I also wanted them location based to allow growth in the future. I didn’t want to create loads of categories. Instead I created a custom taxonomy to tie them together at another level.
Add this to the functions file to create a new separate taxonomy.
/** * Add custom taxonomies * * Additional custom taxonomies can be defined here * http://codex.wordpress.org/Function_Reference/register_taxonomy */ function add_custom_taxonomies() { // Add new "Locations" taxonomy to Posts register_taxonomy('location', 'post', array( // Hierarchical taxonomy (like categories) 'hierarchical' => true, // This array of options controls the labels displayed in the WordPress Admin UI 'labels' => array( 'name' => _x( 'Locations', 'taxonomy general name' ), 'singular_name' => _x( 'Location', 'taxonomy singular name' ), 'search_items' => __( 'Search Locations' ), 'all_items' => __( 'All Locations' ), 'parent_item' => __( 'Parent Location' ), 'parent_item_colon' => __( 'Parent Location:' ), 'edit_item' => __( 'Edit Location' ), 'update_item' => __( 'Update Location' ), 'add_new_item' => __( 'Add New Location' ), 'new_item_name' => __( 'New Location Name' ), 'menu_name' => __( 'Locations' ), ), // Control the slugs used for this taxonomy 'rewrite' => array( 'slug' => 'locations', // This controls the base slug that will display before each term 'with_front' => false, // Don't display the category base before "/locations/" 'hierarchical' => true // This will allow URL's like "/locations/boston/cambridge/" ), )); } add_action( 'init', 'add_custom_taxonomies', 0 );