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<?php $arr = [ 'key1' => 'Label 1', 'key2' => 'Label 2', 'key3' => 'Label 3' ]; $result = array(); $r = &$result; foreach ($arr as $k => $v) { $r[$k] = array($k => $v); $r = &$r[$k]; } print_r($result);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [key1] => Array ( [key1] => Label 1 [key2] => Array ( [key2] => Label 2 [key3] => Array ( [key3] => Label 3 ) ) ) )

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