<?php
    $category = get_the_category();
    $current_category = $category[0]->term_id;
    $qarr = array(
        'posts_per_page' => $posts_number,
        'cat' => $current_category,
        'tag' => 'pinned', // this is the tag that it filters
        'post__not_in' => array(get_the_ID())
    );
    $q = new WP_Query($qarr);
    if($q->have_posts()) : while ($q->have_posts()) : $q->the_post();
    ?>
        <div class="block-post clearfix">
            <?php
                $thumb = '';
                $width = 287;
                $height = 162;
                $classtext = 'post-image';
                $titletext = get_the_title();
                $thumbnail = get_thumbnail($width,$height,$classtext,$titletext,$titletext,false,'Recent');
                $thumb = $thumbnail["thumb"];
            ?>

            <?php if($thumb <> '' && get_option('aggregate_thumbnails_index') == 'on') { ?>
                <div class="thumb">
                    <a href="<?php the_permalink(); ?>">
                        <?php print_thumbnail($thumb, $thumbnail["use_timthumb"], $titletext, $width, $height, $classtext); ?>
                        <span class="overlaybig"></span>
                    </a>
                </div>  <!-- end .post-thumbnail -->
            <?php } ?>

            <div class="recenttitle"><h3 class="title"><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h3></div>
        </div> <!-- end .block-post -->
    <?php endwhile; endif;?>