Drupal doesn't output list of children on custom module page
Another Solution here would be to do what the admin pages do for those pages

$items['admin/somemodule'] = array(
 'title' =&gt; 'My Module Section',
 'description' =&gt; 'Manage My Module',
 'page callback' =&gt; 'system_admin_menu_block_page',
 'access arguments' =&gt; array('access administration pages'),
 'file path' =&gt; drupal_get_path('module', 'system'),
 'file' =&gt; 'system.admin.inc',
);