Unterkategorien Problem

<div id="sidebar">
        <ul>
            <?php     /* Widgetized sidebar, if you have the plugin installed. */
                    if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar() ) : ?>


            <!-- Author information is disabled per default. Uncomment and fill in your details if you want to use it.
            <li><h2>Author</h2>
            <p>A little something about you, the author. Nothing lengthy, just an overview.</p>
            </li>
            -->


            <?php if ( is_404() || is_category() || is_day() || is_month() ||
                        is_year() || is_search() || is_paged() ) {
            ?> <li>


            <?php /* If this is a 404 page */ if (is_404()) { ?>
            <?php /* If this is a category archive */ } elseif (is_category()) { ?>
            <p>You are currently browsing the archives for the <?php single_cat_title(''); ?> category.</p>


            <?php /* If this is a yearly archive */ } elseif (is_day()) { ?>
            <p>You are currently browsing the <a href="<?php bloginfo('url'); ?>/"><?php echo bloginfo('name'); ?></a> weblog archives
            for the day <?php the_time('l, F jS, Y'); ?>.</p>


            <?php /* If this is a monthly archive */ } elseif (is_month()) { ?>
            <p>You are currently browsing the <a href="<?php bloginfo('url'); ?>/"><?php echo bloginfo('name'); ?></a> weblog archives
            for <?php the_time('F, Y'); ?>.</p>


            <?php /* If this is a yearly archive */ } elseif (is_year()) { ?>
            <p>You are currently browsing the <a href="<?php bloginfo('url'); ?>/"><?php echo bloginfo('name'); ?></a> weblog archives
            for the year <?php the_time('Y'); ?>.</p>


            <?php /* If this is a monthly archive */ } elseif (is_search()) { ?>
            <p>You have searched the <a href="<?php echo bloginfo('url'); ?>/"><?php echo bloginfo('name'); ?></a> weblog archives
            for <strong>'<?php the_search_query(); ?>'</strong>. If you are unable to find anything in these search results, you can try one of these links.</p>


            <?php /* If this is a monthly archive */ } elseif (isset($_GET['paged']) && !empty($_GET['paged'])) { ?>
            <p>You are currently browsing the <a href="<?php echo bloginfo('url'); ?>/"><?php echo bloginfo('name'); ?></a> weblog archives.</p>


            <?php } ?>
                
            </li> <?php }?>


            <?php wp_list_pages('title_li=<h2>Pages</h2>' ); ?>


            <li><h2>Archives</h2>
                <ul>
                <?php wp_get_archives('type=monthly'); ?>
                </ul>
            </li>


            <?php wp_list_categories('show_count=1&title_li=<h2>Categories</h2>'); ?>


            <?php /* If this is the frontpage */ if ( is_home() || is_page() ) { ?>
                <?php wp_list_bookmarks(); ?>


                <li><h2>Meta</h2>
                <ul>
                    <?php wp_register(); ?>
                    <li><?php wp_loginout(); ?></li>
                    <li><a href="http://validator.w3.org/check/referer" title="This page validates as XHTML 1.0 Transitional">Valid <abbr title="eXtensible HyperText Markup Language">XHTML</abbr></a></li>
                    <li><a href="http://gmpg.org/xfn/"><abbr title="XHTML Friends Network">XFN</abbr></a></li>
                    <li><a href="http://wordpress.org/" title="Powered by WordPress, state-of-the-art semantic personal publishing platform.">WordPress</a></li>
                    <?php wp_meta(); ?>
                </ul>
                </li>
            <?php } ?>
            
            <?php endif; ?>
        </ul>
    </div>