multi dimensional arrays in PHP

[eluser]obiron2[/eluser]
Guys,
I am struggling with the PHP logic to decode the following
I have an array that looks like this:

Code:

$contacts = Array
(
    [Phone] => Array
        (
            [0] => Array
                (
                    [userID] => 13
                    [contactType] => 1
                    [contactValue] => 999999999
                    [isPrimary] => 1
                )

        )

    [Email] => Array
        (
            [0] => Array
                (
                    [userID] => 13
                    [contactType] => 2
                    [contactValue] => [email protected]
                    [isPrimary] => 0
                )
            [1] => Array
                (
                    [userID] => 13
                    [contactType] => 2
                    [contactValue] => [email protected]
                    [isPrimary] => 1
                )


        )

)

I want to pull the first key (phone, email) from the arrays to use as headings in the view.
The view data will look like this

<h1>Phone</h1>
999999999 Yes
<h1>Email</h1>
[email protected] No
[email protected] Yes

I can get the different records to group together by doing foreach($contacts as $group) and then foreach($group as $record)

What I can't seem to get is the top level keys as values.

The data comes from a single table of contacts, and is built by appending a results set for each contact type as an array to the contacts array.
Is there a better approach for marshalling the data into an associative array
Code for the contacts model and controller is below

Code:

model:
function getContactTypes()
{
  $this->load->database();
  $query = "SELECT Description from contact_type ORDER by sort_order";
  return $this->db->query($query);
}

function getContactsByType($username,$type)
{
  $this->load->database();
  // get the userID for the user
  $userID = $this->get_byUserName($username);
  // get the typeID for the type

  $typeID = $this->getContactTypeByDescription($type['Description']);
  // run the main query
  $query = "SELECT * from user_contacts where userID = $userID->ID AND contactType = $typeID->ID";

  return $this->db->query($query);

}

Controller:
function contacts()
{
  /**********************************************************************************
  used to view and edit the contact methods for the signed in user
  ***********************************************************************************/
  $this->load->model('users_model');
  $username = $this->session->userdata['username'];
  // build a multidimensional array of the contacts
  $types = $this->users_model->getContactTypes()->result_array();
  
  $contacts = array();
  foreach($types as $type)
  {
  
   $contacts[$type['Description']] = $this->users_model->getContactsByType($username,$type)->result_array();
  }
  echo "<pre>";
  print_r($contacts);
  echo "</pre>";
}