Just change your theme checkout/cart.phtml
<th rowspan="<?php echo $mergedCells; ?>"> </th>
<th rowspan="<?php echo $mergedCells; ?>"><span class="nobr"><?php echo $this->__('Product Name') ?></span></th>
<th rowspan="<?php echo $mergedCells; ?>"> </th>
<th class="a-center cart-price-head" colspan="<?php echo $mergedCells; ?>">
<span class="nobr"><?php echo $this->__('Price') ?></span>
</th>
<th rowspan="<?php echo $mergedCells; ?>" class="a-center">
<?php echo $this->__('Qty') ?>
</th>
<th class="a-center cart-total-head" colspan="<?php echo $mergedCells; ?>">
<?php echo $this->__('Subtotal') ?>
</th>
<th class="a-center" rowspan="<?php echo $mergedCells; ?>"> </th>