Looping the loop in domtabs

<div class="domtab cat-menu">
    <ul class="domtabs">
        <?php
        // Projects
        $c_projects = new WP_Query( array(
            'connected_type' => 'event-project',
            'connected_items' => get_queried_object_id(),
            'posts_per_page' => -1,
            'orderby' => '_order',
            'order' => 'ASC'
        ) );
        // Artists
        $c_artists = new WP_Query( array(
            'connected_type' => 'event-artist',
            'connected_items' => get_queried_object_id(),
            'posts_per_page' => -1,
            'orderby' => '_order',
            'order' => 'ASC'
        ) );
        // Merge connected projects & artists and split them into event-time
        $c_artists_projects = array_merge($c_projects->posts, $c_artists->posts);
        $buckets = p2p_split_posts($c_artists_projects, 'event-time' );
        foreach ( $GLOBALS['event-time'] as $type ) {
            if (!isset( $buckets[$type]) )
                continue;
            $bucket = $buckets[$type];
            echo '<li><a href="#'.$type.'">'.$type.'</a></li>';
        } ?>
    </ul>

    <?php foreach ($buckets as $type => $bucket) { ?>
        <div class="tab"><a name="<?php echo $type; ?>" id="<?php echo $type; ?>"></a>
            <?php foreach ($bucket as $post) {?>
                <div class="post-block">
                    <h3><a href="<?php the_permalink(); ?>" title="<?php the_title();?>"><?php the_title(); ?></a></h3>
                    <?php if (get_post_type() == 'project') {
                        $p_artists = new WP_Query( array(
                            'connected_type' => 'artist-project',
                            'connected_items' => $post,
                            'posts_per_page' => -1,
                                'orderby' => 'title',
                            'order' => 'ASC'
                        ) );
                        if ($p_artists->have_posts() ) :
                            while ($p_artists->have_posts() ) : $p_artists->the_post(); ?>
                                <h4><a href="<?php the_permalink(); ?>" title="<?php the_title();?>"><?php the_title(); ?></a></h4>
                            <?php endwhile;
                            wp_reset_postdata();
                        endif; ?>
                    <?php } ?>
                    <div class="taxonomies">
                        <?php echo get_post_meta($post->ID, 'artistdesc', true); ?>
                    </div>
                </div>
            <?php } ?>
        </div>
    <?php }
    wp_reset_postdata();
    wp_reset_query();
    $buckets = null; ?>
</div>