Control group menu content links not working.

Display the Create content link? and Remove the default Create links? are not working. Need to figure that out.

    /**
     * hook_og_create_links
     *
     * Modification as per: http://drupal.org/node/203875
     * $group is an object containing the group node
     */
    function og_user_roles_og_create_links($group) {
      if (variable_get('og_user_roles_links_content_' . $group->nid, 0) == 1) {
        $links[] = l(t('Create content'), "node/add", array('title' => t('Add new content in this group.')), "gids[]=$group->nid");
        return $links;
      }
    }

    /**
     * hook_og_link_alter
     *
     * Modification as per: http://drupal.org/node/2517905
     * Optionally remove create_ links.
     */
    function og_user_roles_og_link_alter(&$links, $group_node) {
      if (variable_get('og_user_roles_links_remove_' . $group_node->nid, 0) == 1) {
        foreach($links as $key => $value) {
          if(substr($key,0,7) == 'create_') {
            unset($links["$key"]);
          }
        }
      }
    }

See: http://drupal.org/node/285474

Looks like I may have to use "drupal_alter('og_links', $links)"

This is the code referred to in og.module:

        // Modify these links by reference. If you want control of the whole block, see og_block_details().
        drupal_alter('og_links', $links, $node);

Found it. The code needs to look like this:

    /**
     * hook_og_create_links
     *
     * Modification as per: http://drupal.org/node/203875
     * $group is an object containing the group node
     */
    function og_user_roles_og_create_links($group) {
      if (variable_get('og_user_roles_links_content_' . $group->nid, 0) == 1) {
        $links[] = l(t('Create content'), "node/ognodeadd", array('title' => t('Add new content in this group.'), 'query' => 'gids[]=' . $group->nid));
        return $links;
      }
    }

    /**
     * hook_og_link_alter
     *
     * Modification as per: http://drupal.org/node/2517905
     * Optionally remove create_ links.
     */
    function og_user_roles_og_links_alter(&$links, $group_node) {
      if (variable_get('og_user_roles_links_remove_' . $group_node->nid, 0) == 1) {
        foreach($links as $key => $value) {
          if(substr($key,0,7) === 'create_') {
            unset($links["$key"]);
          }
        }
      }
    }

Apparently, the l() function changed between versions 5.x and 6.x. Don't know why og_link_alter worked in 5.x but now requires og_links_alter in 6.x.

Modified code. Will include in next release.