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<section class="slider">
 
    <?php if( have_rows('slides') ): ?>
 
        <div id="slider" class="flexslider">
 
            <ul class="slides">
 
            <?php while ( have_rows('slides') ) : the_row(); ?>   
 
                <li>
 
                    <?php $post_object = get_sub_field('featured_projects'); ?>
 
                    <?php if( $post_object ): ?>
 
                        <?php $post = $post_object; setup_postdata( $post ); ?>
 
                        <a href="<?php the_permalink(); ?>"><img src="<?php the_field('featured_image'); ?>" alt="<?php the_title(); ?>" /></a>
 
                        <?php wp_reset_postdata(); ?>
 
                    <?php endif; ?>
 
                </li>
 
            <?php endwhile; ?>
 
            </ul>
 
        </div>
 
    <?php endif; ?>
 
</section>