<div class="col-sm-6 col-md-4 padding-fixation">
        <?php $portfolio_home = new WP_Query('cat=1'); ?>
        <?php while($portfolio_home->have_posts()) : $portfolio_home->the_post(); ?>
        <div class="image-portfolio" data-section="office">
        <div class="img-block">
                <img class="img-responsive" src="<?php the_post_thumbnail(); ?>" alt="">
        </div>
       <div class="overlay-header">
            <h1><?php the_title(); ?></h1>
        </div>
        <div class="text-overlay">
            <p><?php the_content(); ?></p>
        </div>
        </div>
    <?php endwhile; ?>
    </div>