<table border="1" align="center" cellpadding="3">
<tr>
<?php
$x = count($soru);
$sutun = ceil($x/2);
$i = 0;
while($i < $sutun) {
    $y = $i + $sutun;
    echo "<td>".$soru[$i]."</td>\n";
    echo "<td>".$soru[$y]."</td>\n";
    if($i % 2 == 0) echo "</tr>\n<tr>\n";
    $i++;
}
?>
</tr>
</table>