list_categories

Array (
      [1] => Array (
            [id] => 1
            [topics] => 0
            [posts] => 0
            [last_post] =>
            [last_poster_id] => 0
            [last_poster_name] =>
            [name] => A Test Category
            [description] =>
            [position] => 1
            [use_ibc] =>
            [use_html] =>
            [status] =>
            [password] =>
            [last_title] =>
            [last_id] =>
            [sort_key] =>
            [sort_order] =>
            [prune] =>
            [show_rules] =>
            [preview_posts] =>
            [allow_poll] => 1
            [allow_pollbump] => 0
            [inc_postcount] => 1
            [skin_id] =>
            [parent_id] => -1
            [sub_can_post] => 0
            [quick_reply] => 0
            [redirect_url] =>
            [redirect_on] => 0
            [redirect_hits] => 0
            [redirect_loc] =>
            [rules_title] =>
            [rules_text] =>
            [topic_mm_id] =>
            [notify_modq_emails] =>
            [permission_custom_error] =>
            [permission_array] => a:5:{s:11:"start_perms";s:1:"*";s:11:"reply_perms";s:1:"*";s:10:"read_perms";s:1:"*";s:12:"upload_perms";s:1:"*";s:10:"show_perms";s:1:"*";}
            [permission_showtopic] => 0
            [queued_topics] => 0
            [queued_posts] => 0
      )
)

// Grabs all categories and then display a list.
$cat = $SDK->list_categories();
foreach ($cat as $i) {
      echo '<a href="http://localhost/?c='.$i['id'].'">'.$i['name'].'</a><br />';
}