index.php template

<?php
/**
 * The main template file.
 *
 * @package Nu Themes
 */

get_header(); ?>

<div class="add-poll" id="add-poll-id">
        <iframe src="http://pixelstyle.co.uk/outrankd/wp-admin/admin.php?page=wp-polls%2Fpolls-add.php"></iframe>
    </div>

<div class="row" id="poll-content-wrapper">
        <main id="content" class="col-md-8 col-lg-9 content-area" role="main">
<?php

    //The Query
    $the_query = new WP_Query( array( 'author' => implode( ",", $friendsIdArray )  ) );

            // The Loop
            if ( $the_query->have_posts() ) : ?>

            <div id="masonry" class="row">
            <?php while ( $the_query->have_posts() ) : $the_query->the_post(); ?>

                <div class="col-xs-12 col-sm-6 col-lg-4 masonry-item">
                    <?php get_template_part( 'content', get_post_format() ); ?>
                </div>
                <?php

                //Display an advert every 2 posts
                $postnum++; if($postnum%2 == 0) { ?>

                <div class="col-xs-12 col-sm-6 col-lg-4 masonry-item">

                                    <article class="box post type-post status-publish format-standard hentry category-uncategorized">

                                        <header class="entry-header">
                                            <h2 class="entry-title">Advert Here</h2>
                                        </header>

                                        <hr>

                                        <div class="clearfix entry-summary">
                                            <p>advert content here</p>
                                        <!-- .entry-summary --></div>

                                        <footer class="entry-meta entry-footer">
                                            Report this ad
                                        </footer>
                                    </article>
                                </div>
                <?php } ?>

<?php endwhile; ?>
            <!-- #masonry --></div>

            <?php nuthemes_content_nav( 'nav-below' ); ?>
            <?php wp_reset_postdata(); ?>
        <?php else : ?>

            <?php get_template_part( 'no-results', 'index' ); ?>

        <?php endif; ?>

        <!-- #content --></main>

        <?php //get_sidebar(); ?>
    <!-- .row --></div>

<?php get_footer(); ?>