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<?php $first = [ "Catalog No.:", "H-B No.", ]; $second = [ [ "GG", "692" ], [ "VV", "693" ] ]; $result = array_map(function($arr) use ($first){ foreach($first as $key => $value) { $arr[$key] = $value . ' ' . $arr[$key]; } return $arr; }, $second); print_r($result);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [0] => Catalog No.: GG [1] => H-B No. 692 ) [1] => Array ( [0] => Catalog No.: VV [1] => H-B No. 693 ) )

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