function prefix_load_cat_posts () {
$wp_query = '';
$paged = '';
$temp = $wp_query;
$wp_query= null;
$wp_query = new WP_Query();
$wp_query->query('posts_per_page=4');
while ($wp_query->have_posts()) : $wp_query->the_post();
?>

	<li class="recent-post shortcode-general-list-item">
         <div class="recent-post-thumb"><a href="<?php the_permalink(); ?>"><?php the_post_thumbnail('thumbnail'); ?></a></div>
       	 <div class="recent-post-title"><a href="<?php the_permalink(); ?>" class="recent-post-title-link"><?php the_title(); ?></a>
		 <div class="recent-post-bottom"><span class="recent-post-bottom-child"><?php echo get_the_author(); ?> <?php printf( _x( '%s ago', '%s = human-readable time difference', 'textdomain' ), human_time_diff( get_the_time( 'U' ), current_time( 'timestamp' ) ) ); ?></span></div></div>
	</li>

<?php endwhile; // end of loop
wp_reset_postdata();
die();
}
add_action( 'wp_ajax_nopriv_load-filter', 'prefix_load_cat_posts' );
add_action( 'wp_ajax_load-filter', 'prefix_load_cat_posts' );