In an array such as the one below, how could I rename "fee_id" to "id"?

Input array:

[
    ['fee_id' => 15, 'fee_amount' => 308.5, 'year' => 2009],
    ['fee_id' => 14, 'fee_amount' => 308.5, 'year' => 2009],
]

Expected result:

[
    ['id' => 15, 'fee_amount' => 308.5, 'year' => 2009],
    ['id' => 14, 'fee_amount' => 308.5, 'year' => 2009],
]
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