Array in a form

please the result set i was getting from the values in a form was initially grouping two values in an array thats the [Pquantity] and [Pidno],but after adjusting the form to include another [Tprice], the array comes back splitting the valueas into individual arrays e.g and also including my button name as a key, ow can i retain the values as an array

the first scenario

Array ( [item] => Array ( [0] => Array ( [Pquantity] => 6 [Pidno] => 6 ) [1] => Array ( [Pquantity] => 7 [Pidno] => 4 ) [2] => Array( [Pquantity] => 8 [Pidno] => 1 ) [3] => Array( [Pquantity] => 9 [Pidno] => 2 ) ) )

the second scenario

Array ( [item] => Array ( [0] => Array ( [Pquantity] => 3 ) [1] => Array ( [Pidno] => 3 ) [2] => Array ( [Tprice] => 120 ) [3] => Array ( [Pquantity] => 2 ) [4] => Array ( [Pidno] => 2 ) [5] => Array ( [Tprice] => 60 ) [6] => Array ( [Pquantity] => 1 ) [7] => Array ( [Pidno] => 1 ) [8] => Array ( [Tprice] => 20 ) ) [submit1] => UPDATE )

this is the form

<?php
// Get DB results and loop, outputting table rows with counter
$pplresult = mysql_query("SELECT * FROM repplac WHERE Uname = '{$_SESSION['username']}'") or die(mysql_error());
while ($row = mysql_fetch_assoc($pplresult)) {
echo "
<tr>
<td>".htmlspecialchars($row['Sname'])."</td>
<td>".htmlspecialchars($row['Pname'])."</td>
<td>".htmlspecialchars($row['Psize'])."</td>
<td>".htmlspecialchars($row['Pcolour'])."</td>
<td>
<input type='text' name='item[$i][Pquantity]' id='Pquantity' value='".htmlspecialchars($row['Pquantity'])."' />
<input type='hidden' name='item[$i][Pidno]' id='Pidno' value='".htmlspecialchars($row['Pidno'])."' />
</td>
<td>".htmlspecialchars($row['Price'])."</td>
<td>
<input type='text' name='item[$i][Tprice]' id='Pquantity' value='".htmlspecialchars($row['Tprice'])."' readonly>
</td>
<td><a href='deleteproduct.php?del=".htmlspecialchars($row['Pidno'])."'>delete</a></td>
</tr>";
}
   $pplresult = mysql_query("SELECT * FROM repplac WHERE Uname = '{$_SESSION['username']}'") or die(mysql_error());
  while ($row = mysql_fetch_assoc($pplresult)) 
   //echo $row['Pquantity'] * $row['Price'];
  {
  $totalprice += $row['Tprice'];
  }
  //echo "$totalprice";


     ?>
     <tr>
            <th>Total Price</th>
            <th><?php echo $totalprice; ?></th>

        </tr>
<!--Close table and form-->

</table>
<input type='submit' name='submit1' value='UPDATE' />
<input type='submit' name='submit2' value='SUBMIT' />
</form>

thanks i have sorted it