Shorten title on item browse page

Hi everyone,

I have been having difficulty shortening the link to my items on the public Item Browse page. I have successfully shortened the description that is displayed, but I receive errors when altering this piece in: Applications/Views/Scripts/Items

<?php foreach (loop('items') as $item): ?>
<div class="item hentry">
<h2><?php echo link_to_item(metadata('item', array('Dublin Core', 'Title')), array('class'=>'permalink')); ?></h2>
<div class="item-meta">
<?php if (metadata('item', 'has thumbnail')): ?>
<div class="item-img">
<?php echo link_to_item(item_image('square_thumbnail')); ?>
<?php endif; ?>

Can anyone offer advice? I'd really appreciate it.