Unhandled Error!

Trying to get property of non-object

Document Blog Category Post List
Document type CMS page
Line 11
Exception class Cms_ExecutionException

Code Highlight

<nav class="breadcrumb">
    <div class="row">
        <div class="twelve columns">
            <ul>
                <li> <a href="<?php echo root_url('/'); ?>">Home</a> </li>
                <li> <a href="<?php echo root_url('/blog'); ?>">Blog</a> </li>
                <li> <a href="<?php $category ?>"><?= h($category->name) ?></a> </li>
            </ul>
        </div>
    </div>
</nav>
<section class="content">
    <section class="static-page block top">
# Document Type
1 Blog Category Post List CMS page