Create your own url with directories without using Friendly Alias Path

	/**
	 * Format alias to be URL-safe. Strip invalid characters.
	 *
	 * @param string Alias to be formatted
	 * @return string Safe alias
	 */
    function stripAlias($alias) {
        // let add-ons overwrite the default behavior
        $results = $this->invokeEvent('OnStripAlias', array ('alias'=>$alias));
        if (!empty($results)) {
            // if multiple plugins are registered, only the last one is used
            return end($results);
        } else {
            // default behavior: strip invalid characters and replace spaces with dashes.
            $alias = strip_tags($alias); // strip HTML
            $alias = preg_replace('/[^\.A-Za-z0-9 _-]/', '', $alias); // strip non-alphanumeric characters
            $alias = preg_replace('/\s+/', '-', $alias); // convert white-space to dash
            $alias = preg_replace('/-+/', '-', $alias);  // convert multiple dashes to one
            $alias = trim($alias, '-'); // trim excess
            return $alias;
        }
    }

$alias = preg_replace('/[^\.A-Za-z0-9 _-]/', '', $alias);

$alias = preg_replace('/[^\.A-Za-z0-9 _-\/]/', '', $alias);

 // File/path punctuation (usually not wanted, but might be wanted in some cases)
'/'=>'',