Unhandled Error!

Trying to get property of non-object

Document	Product
Document type	CMS page
Line	7
Exception class	Cms_ExecutionException

Code Highlight

<nav class="breadcrumb">
	<ul class="items">
		<li>
			<a href="<?php echo root_url('/'); ?>">Home</a>
		</li>
		<li>
			<a href="<? echo $product->category_list[0]->page_url('/category'); ?>" title="<?php echo $product->category_list[0]->name; ?>"><?php echo $product->category_list[0]->name;?></a>
		</li>
		<li>
			<a href="<?php echo $product->page_url('/product'); ?>"><?php echo $product->name; ?></a>
		</li>
	</ul>
</nav>

#	Document	Type
1	Product	CMS page