$arr1 = [
80, 80, 90, 90, 90
];
$arr2 = [
[ 190 ],
[ 200 ],
[ 190 ],
[ 195 ],
[ 200 ]
];
$result = [];
for ($i = 0; $i < count($arr1); $i++) {
$key = $arr1[$i];
if (!isset($result[$key])) {
$result[$key] = [];
}
array_push($result[$key], ...$arr2[$i]);
$result[$key] = array_unique($result[$key]);
}