Php pdo select row using database row id

Previously am using mysql to loop on users data getting the table row by rws[0], now that i change to pdo i still need to use this rws[0] get each row instead of using the row name like this $id = $rws->id; in pdo how can i make this work in pdo?

OLD MYSQL

<?php
include('co.php');
$sql="SELECT * FROM users";
$result=  mysql_query($sql) or die(mysql_error());
while($rws =  mysql_fetch_array($result)){
$id = $rws[0];
$name = $rws[1];
$email = $rws[2];
} 
?>

NEW PDO

 <?php
    $sql = new DBController();
    $sql->prepare("SELECT * FROM users");
    $sql->execute();
    $result = $sql->getAll();
    $sql->free();
    if(!is_null($result)){
    foreach($result as $i => $rws){
    $id = $rws->id; // just want it to be this >> $id = $rws[0];
    $name = $rws->name; // I tried this $name = $rws->[0];
    $email = $rws->email;
      }
    }
    ?>