If you want to show Hour in different DDL and Min in different ddl then you can use the below
<select name="wedend" id="wedend">
<option value="0">Select Hour</option>
<?php
for ($i = 0; $i < 24; $i++) {
$num = $i;
$num = $num < 10 ? "0$num" : $num;
echo "<option value=\"$num\"> $num</option>\n";
}
?>
</select>