Category is select2 friendly and will accept the url parameters of Page,System,Term,Id.
when system is supplied a extra key is added to each item called "count" which is the count of items that system refers to.
{ "total": 244, "items": [ { "id": 1, "text": "Abiotic Damage" }, { "id": 2, "text": "Nuisance Insects" }, { "id": 3, "text": "Aquatic" }, { "id": 4, "text": "Bark Beetles and Phloem Feeding Insects" }, { "id": 5, "text": "******" }, { "id": 6, "text": "Unknown Biotic Damage Agent" }, ] }