wp: CUSTOM TAXONOMY WITH SAME SLUG AS CUSTOM POST TYPE

taxonomy-slug-as-custom-post-type.php

<?php

/*
* Source: http://someweblog.com/wordpress-custom-taxonomy-with-same-slug-as-custom-post-type/
*/

// rewrite urls
function taxonomy_slug_rewrite($wp_rewrite) {
    $rules = array();

    $taxonomies = get_taxonomies(
        array('_builtin' => false), 
        'objects'
    );

    $post_types = get_post_types(
        array('public' => true, '_builtin' => false), 
        'names'
    );

    foreach ($post_types as $post_type) {
	foreach ($taxonomies as $taxonomy) {

	    if ($taxonomy->object_type[0] != $post_type) continue;

            $categories = get_categories(array(
                'type' => $post_type, 
                'taxonomy' => $taxonomy->name, 
                'hide_empty' => 0
            ));

            foreach ($categories as $category) {
                $rules[$post_type . '/' . $category->slug . '/?$'] = 
                    'index.php?' . $category->taxonomy . '=' . $category->slug;
            }
	} // taxonomies
    } // post_types
    $wp_rewrite->rules = $rules + $wp_rewrite->rules;
}
add_filter( 'generate_rewrite_rules', 'taxonomy_slug_rewrite' );

?>