Filter WordPress Registration URL

gistfile1.phtml

add_filter('register', 'my_custom_registration_link');

function my_custom_registration_link($link) {
  if(!is_user_logged_in()) {
    // In this example there is a page with slug 'register' so the url would be http://mysite.com/register
    $link = '<div class="status register"><a href="' . site_url('register') . '">' . __('Register') . '</a></div>';
  }
  return $link;
} // End my_custom_registration_link()