API Name: global.getMyCatalogCategories

function getMyCatalogCategories() {
var gr = new GlideRecord("catalog_category_request");
gr.addEncodedQuery("manager=" + gs.getUserID() + "^OReditorsLIKE" + gs.getUserID());
gr.addNotNullQuery("category");
gr.query();
var answer = [];
var i = 0;
while (gr.next())
answer[i++] = new String(gr.category);

return answer;
}