gistfile1.txt

// simply fixed custom permalink
// dependencies: Custom Permalinks (plugin)

class Test{
  public function __construct()
  {
    add_filter('get_sample_permalink_html', array(
        $this,'get_sample_permalink_html'
    ), 999, 4);
  }
  // fixed permalink: 'original-post'
  public function get_sample_permalink_html($html, $id, $new_title, $new_slug)
  {
    // replace target: '?post_type=any&p=67'
    // to: 'original-post'
    $search_value = htmlspecialchars(sprintf('?post_type=%s&p=%d', 'original', $id));
    $replace_value = "original-post";
    $replaced_html = str_replace($search_value, $replace_value, $html);
    return $replaced_html;
  }
}