Taxonomy exemplo para modelos

taxonomy_modelos.php

<?php
  function modelos() {
  
    $labels = array(
		'name'              => 'Modelos',
		'singular_name'     => 'Modelo'
	      );
	  
    $args = array(
	    'hierarchical'          => true,
	    'labels'                => $labels,
	    'show_ui'               => true,
	    'show_admin_column'     => true,
	    'update_count_callback' => '_update_post_term_count',
	    'query_var'             => true,
	    'rewrite'               => array( 'slug' => 'modelos' ),
	    'exclude_from_search' => false,
	    'publicly_queryable' => true,
	    'public' => true,
	  );
		
	 register_taxonomy( 'modelos', 'produtos', $args );
  }
 add_action( 'init', 'modelos' );
?>