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@ 2013-04-25T11:10:55Z

<?php
$old = array(
    array(
        'id' => 2,
        'label' => 'MTD-589'
    ),
    array(
        'id' => 3,
        'label' => 'MTD-789'
    ),
);


$new = array_map(function($a){
   return array($a['id']=>$a['label']);
},$old);

print_r($new);

Output
Performance
VLD
References
Branches

array_map: documentation ( source)
print_r: documentation ( source)

preferences:dark modelive preview

41.14 ms | 402 KiB | 5 Q