Aktuelle Kategorie im Archiv auslesen

<?php
            $cats = get_categories();
            foreach ($cats as $cat) {
            query_posts('showposts=3&cat='.$cat->cat_ID);
        ?>
        <div class="sidebar-cat">
        <h2><?php echo $cat->cat_name; ?></h2>
        <ul class="recent-posts">    
            <?php while (have_posts()) : the_post(); ?>
            <li><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></li>
            <?php endwhile;  ?>
            <?php wp_reset_query(); ?>
        </ul>
        </div>
        <?php } ?>

<?php /* Kategorie-Archiv - letzte Artikel aus allen Kategorien */ ?>
        <?php if (is_category()) : 
            $catid = get_cat_ID( single_cat_title('',false) );
            $cats = get_categories('exclude=' . $catid);
            foreach ($cats as $cat) {
            query_posts('showposts=3&cat='.$cat->cat_ID);
        ?>
        <div class="sidebar-cat">
        <h2><?php echo $cat->cat_name; ?></h2>
        <ul class="recent-posts">    
            <?php while (have_posts()) : the_post(); ?>
            <li><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></li>
            <?php endwhile;  ?>
            <?php wp_reset_query(); ?>
        </ul>
        </div>
        <?php } ?>
        <?php endif; ?>
        
        
        
        <?php /* Startseite - letzte Artikel aus allen Kategorien */ ?>
        <?php if (is_home()) { 
            $cats = get_categories();
            foreach ($cats as $cat) {
            query_posts('showposts=5&cat='.$cat->cat_ID);
        ?>
        <div class="sidebar-cat">
        <h2><?php echo $cat->cat_name; ?></h2>
        <ul class="recent-posts">    
            <?php while (have_posts()) : the_post(); ?>
            <li><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></li>
            <?php endwhile;  ?>
            <?php wp_reset_query(); ?>
        </ul>
        </div>
        <?php } ?>
        <?php } ?>