<?php foreach ($orders->result() as $order): ?>
			<tr <?php if ($order->new) echo 'class="bold"'; ?> >
				<td><?php echo form_checkbox('action_to[]', $order->id); ?></td>
				<td><a href="admin/shop/view_order/<?php echo $order->id; ?>"><?php echo $order->id; ?></a></td>
                                <td><?php print_r($order); ?> <?php echo $info_array[$order->id]->username; ?></td>//ВОТ ЭТА СТРОЧКА
                                <td><?php echo $order->date; ?></td>
				<td class="align-center buttons buttons-small">
                                    <?php if ($order->cancelled == 0) : ?>
					<?php echo anchor('admin/shop/cancel_order/' . $order->id, lang('shop.order_cancel_label'),
                                                          'class="button cancel"'); ?>
                                    <?php else : ?>
                                        <?php echo lang('shop.order_canceled_label'); ?>
                                    <?php endif; ?>
				</td>
			</tr>
			<?php endforeach; ?>

echo $info_array->{$order->id}->username;

echo $info_array->{$order->id}->username;

Array ( [2] => Array ( [0] => Array ( [id] => 2 [date] => 2012-01-13 15:30:23 [customer] => 1 [is_new] => 1 [is_cancelled] => 0 [username] => Tolya [email] => Tolyanchik_07@bk.ru [first_name] => Tolya [last_name] => Paltsev [phone] => [address_line1] => [address_line2] => [address_line3] => ) ) [1] => Array ( [0] => Array ( [id] => 1 [date] => 2012-01-13 15:28:57 [customer] => 2 [is_new] => 1 [is_cancelled] => 0 [username] => ivan [email] => Ivan@bk.ru [first_name] => Иван [last_name] => Иванов [phone] => [address_line1] => [address_line2] => [address_line3] => ) ) )

stdClass Object ( [id] => 2 [customer] => 1 [date] => 2012-01-13 15:30:23 [cancelled] => 0 [new] => 1 )

foreach($info_arr as $arr){
    if($arr[0]['id'] == $order->id){
        echo $arr[0]['username'];
        break;
    }
}