reformating cakephp find threaded - json

Question

My goal is to use a tree object to store invoices. The issue I'm running into is that it always puts a "Invoice" model wrapper around each subsequent child. I tried just getting the results and using the Set class to clean up the redundant "Invoice", "children" but I couldn't figure out how to get it to work. I'm using this in an API so basically what I want to be able to do is move up and down the array without having to constantly do invoice.children.invoice.children
In my controller I have:
$results = $this->Invoice->find('threaded', array(
'order' => array('lft ASC') // or array('id ASC')
));
$this->set(array(
'results' => $results,
'_serialize' => 'results'
));
What I'm getting is:
{
"success": true,
"data": [
{
"id": 1,
"parent_id": null,
"lft": 1,
"rght": 30,
"name": "Invoices",
"children": [
{
"Invoice": {
"id": 2,
"parent_id": 1,
"lft": 2,
"rght": 15,
"text": "invoice 001"
},
"children": [
{
"Invoice": {
"id": 3,
"parent_id": 2,
"lft": 3,
"rght": 8,
"text": "invoice_item"
},
"children": [
{
"Invoice": {
"id": 4,
"parent_id": 3,
"lft": 4,
"rght": 5,
"text": "invoice_sub_item"
},
"children": []
},
{
"Invoice": {
"id": 5,
"parent_id": 3,
"lft": 6,
"rght": 7,
"text": "subitem#2"
},
"children": []
}
]
}
]
}
]
}
]
}
Ideally I'd like to have
invoices.invoice.text = "invoice 001"
and
invoices.invoice.invoice_item[0].text = "invoice_item"
Obviously I'll need to add/take away from the array and resubmit with changes. Is this possible or am I just making things harder on myself?