Array ( [1] => Array ( [group_name] => Item Type [group_slug] => item-type [tags] => Array ( [105] => Array ( [tag_name] => Painting [tag_slug] => painting ) ) ) [3] => Array ( [group_name] => Period [group_slug] => period [tags] => Array ( [307] => Array ( [tag_name] => 21st Century [tag_slug] => 21st Century ) ) ) )