PHP numbering by name grouping

I want to auto numbering but by user group

Query :

$query = "select distinct(DATE_FORMAT(a.in_time, '%Y%m%d')) as in_time, a.user_id, a.notes, b.nama from attendance a left join dat_login b on(a.user_id=b.ID) where DATE_FORMAT(a.in_time, '%Y')='2017' and DATE_FORMAT(a.in_time, '%M')='April' and id_shop!=2 order by b.nama asc";
$querynm = "select distinct(b.nama) as nama from attendance a left join dat_login b on(a.user_id=b.ID) where DATE_FORMAT(a.in_time, '%Y')='2017' and DATE_FORMAT(a.in_time, '%M')='April' group by b.nama order by b.nama asc";
$stid = mysqli_query($conn, $query) or die (mysqli_error($conn));
$stnm = mysqli_query($conn, $querynm) or die (mysqli_error($conn));

Result :

$alphabet_start = 'A';
while ($data = mysqli_fetch_assoc($stid)) {
$data['user_id'] += 1;
$no_cell = 11;
echo $data['nama'] . " ";
echo $data['user_id'] . " ";
  if ($data['notes']=="") {
    echo chr(ord("A") + date('d', strtotime($data['in_time']))) . $no_cell . " - " . chr(ord("A") + date('d', strtotime($data['in_time']))) . ". " . "Masuk <br>";
  } else if ($data['notes']=="S") {
    echo chr(ord("A") + date('d', strtotime($data['in_time']))) . $no_cell . " - " . chr(ord("A") + date('d', strtotime($data['in_time']))) . ". " . "Sakit <br>";
  } else if ($data['notes']=="L") {
    echo chr(ord("A") + date('d', strtotime($data['in_time']))) . $no_cell . " - " . chr(ord("A") + date('d', strtotime($data['in_time']))) . ". " . "Libur <br>";
  }
$alphabet_start++;
$no_cell++;
$data['user_id']++;
}

But, the value showing like this :

I want the value showing like this :

As you can see the number is changing in the next name, how to do it ? Sorry for my bad grammar. Thanks before :)