Unhandled Error!

<? $this->render_partial('snippet:banner'); ?>
 
<section class="snippet">
	<div class="container">
		<div class="row">
			<div class="col-md-7 col-md-offset-1 posts">
				<h1><?= $category->name; ?></h1>
				<? $this->render_partial('blog:posts',array('posts'=>$category->posts)); ?>
			</div>
			<div class="col-md-3">
				<div class="sidebar">
					<div class="header text-center">
						<p class="uppercase"><strong>Blog Categories</strong></p>