post category permalink override

if ( ! function_exists( 'jnews_post_category_permalink' ) ) {
    function jnews_post_category_permalink( $cat, $cats, $post ) {
        if ( $term = jnews_get_primary_category( $post->ID ) ) {
            $cat = get_term( $term );
        }

        return $cat;
    }

    add_filter( 'post_link_category', 'jnews_post_category_permalink', 10, 3 );
}