Wordpress Rewrite Rules Change

change.php

<?php
	add_action('init','rewriteRules');
	add_filter('post_type_link', 'portfolioPermalinks', 10, 3);
	
	function rewriteRules()
	{
	 
    	// Register custom rewrite rules for portfolio post type
		global $wp_rewrite;
		$wp_rewrite->add_rewrite_tag('%portfolio%', '([^/]+)', 'portfolio=');
		$wp_rewrite->add_rewrite_tag('%director_name%', '([^/]+)', 'director_name=');
		 
		$wp_rewrite->add_permastruct('portfolio', 'portfolio/%director_name%/%portfolio%', false);
	 
	}
	
	function portfolioPermalinks($permalink, $post, $leavename) {
		 
		$no_data = 'video';
		 
		$post_id = $post->ID;
		 
		if($post->post_type != 'portfolio' || empty($permalink) || in_array($post->post_status, array('draft', 'pending', 'auto-draft'))){
			return $permalink;
		}
		 
		$director_name = Director::getName( get_post_meta($post_id,'_ptt_video_director',true) );

		 
		$var1 = sanitize_title($director_name);

		 
		if(!$var1) { $var1 = $no_data; }
		 
		$permalink = str_replace('%director_name%', $var1, $permalink);
		 
		return $permalink;
	 
	}