Get values of checkbox to other page - php

Question

I have this code:
<table class="table table-bordered">
<thead>
<tr>
<th class="thheader">Monday</th>
<th class="thheader">Tuesday</th>
<th class="thheader">Wednesday</th>
<th class="thheader">Thursday</th>
<th class="thheader">Friday</th>
</tr>
</thead>
<?php
$available = array();
while ($row3 = mysqli_fetch_assoc($result3))
{
$dayt = $row3['day_of_week'];
$times = $row3['time_window_label'];
$tt= explode(",",$times);
$available[$dayt][] = trim($tt[1]);
}
for ($x=0; $x<3; $x++)
{
?>
<tr>
<td>
<center>
<?php
if($available[1][$x] != ''){
$counter++;?>
<input type="checkbox" class="colour-button choice1 daypicker1" day="1" name="val1" value="<?php echo #$tt[1]?>" id="btn112<?php echo $counter;?>" /><label for="btn112<?php echo $counter;?>"> <i class="fa fa-check-circle hide12" id="chk-btn112<?php echo $counter;?>"></i> <?php echo #$available[1][$x];?></label>
<?php }?>
</center>
</td>
<td>
<center>
<?php if($available[2][$x] != ''){
$counter++;?>
<input type="checkbox" class="colour-button choice2 daypicker2" day="2" name="val2" value="<?php echo #$tt[1]?>" id="btn1012<?php echo $counter;?>" /><label for="btn1012<?php echo $counter;?>"> <i class="fa fa-check-circle hide13" id="chk-btn1012<?php echo $counter;?>"></i> <?php echo #$available[2][$x];?></label>
<?php }?>
</center>
</td>
<td>
<center>
<?php if($available[3][$x] != ''){
$counter++;?>
<input type="checkbox" class="colour-button choice3 daypicker3" day="3" name="val3" value="<?php echo #$tt[1]?>" id="btn102<?php echo $counter;?>" /><label for="btn102<?php echo $counter;?>"> <i class="fa fa-check-circle hide14" id="chk-btn102<?php echo $counter;?>"></i> <?php echo #$available[3][$x];?></label>
<?php }?>
</center>
</td>
<td>
<center>
<?php if($available[4][$x] != ''){
$counter++;?>
<input type="checkbox" class="colour-button choice4 daypicker4" day="4" name="val4" value="<?php echo #$tt[1]?>" id="btn1032<?php echo $counter;?>" /><label for="btn1032<?php echo $counter;?>"> <i class="fa fa-check-circle hide15" id="chk-btn1032<?php echo $counter;?>"></i> <?php echo #$available[4][$x];?></label>
<?php }?>
</center>
</td>
<td>
<center>
<?php if($available[5][$x] != ''){
$counter++;?>
<input type="checkbox" class="colour-button choice5 daypicker5" day="5" name="val5" value="<?php echo #$tt[1]?>" id="btn1042<?php echo $counter;?>" /><label for="btn1042<?php echo $counter;?>"> <i class="fa fa-check-circle hide16" id="chk-btn1042<?php echo $counter;?>"></i> <?php echo #$available[5][$x];?></label>
<?php }?>
</center>
</td>
</tr>
<?php }?>
</table>
It is inside a form, and when I click submit I want to be able to get the values that are in the form. The problem I'm facing is that my rows are dynamic, for example here is my outcome:
These are checkboxes, and the user is only allowed to pick one per day. However when I send the form this is how I tried getting the values:
$value1 = $_POST['val1'];
$value2 = $_POST['val2'];
$value3 = $_POST['val3'];
$value4 = $_POST['val4'];
$value5 = $_POST['val5'];
echo $value1;die;
However my output is only 5AM-8AM all the time, it is never 9AM-12PM even if I chose it. it is always the first time on the row. How can I fix this?