[Tiki-users] How to get category name by its id

Hi,

What's the best way of showing the name of a category with a given Id?
{category id="4" sub="n" showlinks="n" categoryshowlink="n"
maxRecords="0" showTitle="y"}
works, but feels hackish and includes hard coded word "category" to the output.
{LIST(cache="y")}
  {output template="debug"}
  {filter field="object_id" exact="4"}
{LIST}
returns no results, so it looks like categories do not get into the
unified index. Do I need to enable something?

Thanks,
Ilya