[
{ "label": "Folder 1", "items": [{ "value": "ajax.htm", "label" : "Loading..." } ] },
{ "label": "Folder 2", "items": [{ "value": "ajax.htm", "label" : "Loading..." } ] },
{ "label": "Folder 3", "items": [{ "value": "ajax.htm", "label" : "Loading..." } ] }
]