how to add an anchor to prev and next links

Hi,
i'm new and also new to drupal.
In trying to give an anchor link as in the object.
I edited this code:

$links['custom_pager_next'] = array(
    'title' => t('next ›'),
    'href' => !empty($nav_array['next']) ? 'node/'. $nav_array['next']  : NULL,
  );

and added

    'href' => !empty($nav_array['next']) ? 'node/'. $nav_array['next'] .'#myanchor' : NULL,

the problem is that "#" is rendered to "%23" and obviously link it's not working.

Please let me know how to fix it.

thanks