/**
 * nice_masonry_blog_ajax()
 *
 * Ajax function for the masonry blog
 *
 * @since 1.0.0
 *
 */
function nice_masonry_blog_ajax($args = array())
{
    check_ajax_referer('play-nice', 'nonce');
    if (!empty($_POST)) {
        $page = isset($_POST['pageNumber']) ? $_POST['pageNumber'] : 0;
        $output = '';
        $columns = 3;
        $loop = 0;
        $query_args = array('posts_per_page' => get_option('posts_per_page'), 'paged' => $page);
        // The Query
        $query = new WP_Query($query_args);
        // The Loop
        if ($query->have_posts()) {
            while ($query->have_posts()) {
                $query->the_post();
                $loop++;
                $class = '';
                if ($loop % $columns == 0) {
                    $class = 'last';
                }
                if (($loop - 1) % $columns == 0) {
                    $class = 'first';
                }
                $output .= '<div id="post-' . get_the_ID() . '" class="masonry-item isotope-item columns-' . $columns . ' ' . $class . '">';
                $output .= '<!-- BEGIN .post -->';
                $output .= '<article class="post clearfix">';
                if (has_post_thumbnail()) {
                    $output .= '<figure class="featured-image view view-more">';
                    $output .= '<a href="' . get_permalink() . '" title="' . sprintf(__('Permanent Link to %s', 'nicethemes'), get_the_title()) . '">';
                    $output .= nice_image(array('width' => 580, 'height' => 405, 'class' => 'wp-post-image', 'echo' => false));
                    $output .= '</a>';
                    $output .= '</figure>';
                }
                $output .= '<header>';
                $output .= '<h2 class="post-title">';
                $output .= '<a href="' . get_permalink() . '" rel="bookmark" title="' . sprintf(__('Permanent Link to %s', 'nicethemes'), get_the_title()) . '">' . get_the_title() . '</a>';
                $output .= '</h2>';
                ob_start();
                nice_post_meta_masonry();
                $post_meta_masonry = ob_get_contents();
                ob_end_clean();
                $output .= $post_meta_masonry;
                $output .= '</header>';
                $output .= '<div class="entry">';
                $output .= '<div class="post-content">';
                $nice_excerpt = substr(get_the_excerpt(), 0, 400);
                //truncate excerpt according to $len
                if (strlen($nice_excerpt) < strlen(get_the_excerpt())) {
                    $nice_excerpt = $nice_excerpt . "...";
                }
                $output .= '<p>' . $nice_excerpt . '</p>';
                $output .= '<a class="readmore" href="' . get_permalink() . '" title="' . sprintf(__('Permanent Link to %s', 'nicethemes'), get_the_title()) . '">' . __('Read More', 'nicethemes') . '</a>';
                $output .= '</div>';
                $output .= '</div>';
                $output .= '<!-- END .post -->';
                $output .= '</article>';
                $output .= '</div>';
            }
        } else {
            $output .= '<div class="no-more-posts clearfix"><span>' . __('No More Posts Found.', 'nicethemes') . '</span></div>';
        }
        echo $output;
        /* Restore original Post Data */
        wp_reset_postdata();
    }
    die;
}
					<!-- BEGIN .post -->
					<article class="post clearfix">

						<?php if ( has_post_thumbnail() ) :	?>
							<figure class="featured-image view view-more">
									<a href="<?php the_permalink(); ?>" title="<?php printf( __( 'Permanent Link to %s', 'nicethemes' ), get_the_title() ); ?>">
										<?php nice_image( array( 'width' => 580, 'height' => 405, 'class' => 'wp-post-image' ) ); ?>
									</a>
							</figure>
						<?php endif; ?>

						<header>
							<h2 class="post-title">
								<a href="<?php the_permalink() ?>" rel="bookmark" title="<?php printf( __( 'Permanent Link to %s', 'nicethemes' ), get_the_title() ); ?>"><?php the_title(); ?></a>
							</h2>
							<?php nice_post_meta_masonry(); ?>
						</header>

						<div class="entry">

							<div class="post-content">
								<?php the_excerpt(); ?>

								<a class="readmore" href="<?php echo get_permalink( get_the_ID() ); ?>" title="<?php printf( __( 'Permanent Link to %s', 'nicethemes' ), get_the_title() ); ?>"> <?php _e( 'Read More', 'nicethemes' ); ?></a>
							</div>

						</div>

				<!-- END .post -->
				</article>