Drupal Block PHP

Im created a custom block, with the below code, but im having some trouble turning the Group Title i开发者_JAVA技巧nto an link, that will take the user back to the group at anytime.

Below is the code ive used, I thought active turns it into a link, but perhaps im being stupid.

  <div class="active"><h2><?php print $group_title; ?></h2></div>

Below is the full code:

<?php $group_title = og_get_group_context()->title; ?>
<?php $group_nid = og_get_group_context()->nid; ?>
<?php $forum_link = og_forum_get_forum_container($group_nid); ?>
<div class="active"><h2><?php print $group_title; ?></h2></div>
<div class="content"
    <div class="item-list">
        <ul>
            <li class="user-input-link"><a title="Add a new Forum topic"href="/node/add/forum?gids[]=<?php print $group_nid; ?>">Add a new forum topic</a>
          </ul>
    </div>
</div>

You need to create URL for it to work.

Here is the link to API with more info: http://api.drupal.org/api/drupal/includes--common.inc/function/l/6

<div class="active"><h2><?php print l($group_title, "node/{$group_nid}"); ?></h2></div>

You need to do an anchor tag, like:

<div><h2><a href="url_goes_here"><?php print $group_title; ?></a></h2></div>

I don't know how to get the url in Drupal though..