'Costs',
'children' => array(
array(
'name' => 'Deify',
'children' => array(
array('name' => 'Sub A1', 'children' => array(
array('name'=>'3rd level 1', 'size'=>4),
array('name'=>'3rd level 2', 'size'=>2)
)),
array('name' => 'Sub A1', 'children' => array(
array('name'=>'2rd level 1', 'size'=>4),
array('name'=>'2rd level 2', 'size'=>2)
)),
array('name' => 'Sub A2', 'size' => 8)
)
),
array(
'name' => 'Topic B',
'children' => array(
array('name' => 'Sub B1', 'size' => 3),
array('name' => 'Sub B2', 'size' => 3),
array('name' => 'Sub B2', 'size' => 3),
array('name' => 'Sub B3', 'size' => 3))
),
array(
'name' => 'Topic C',
'children' => array(
array('name' => 'Sub A1', 'size' => 4),
array('name' => 'Sub A2', 'size' => 4)
)
),
)
);
$output = json_encode($test_array);
?>