Display categories for Custom Post Types, add to functions.php

Display Wordpress categories for Custom Post Types

// Display categories for Custom Post Types, add to functions.php    

add_filter('pre_get_posts', 'query_post_type');
    function query_post_type($query) {
      if(is_category() || is_tag()) {
        $post_type = get_query_var('post_type');
        if($post_type)
            $post_type = $post_type;
        else
            $post_type = array('post','news'); //substitute cpt - in this case 'news' - for post type
        $query->set('post_type',$post_type);
        return $query;
        }
    }