how to show subdirecories ?

hi

i want to show the subdirectories it my theme

theme name :
Nursena

screenshot

http://www.imageupload.co.uk/files/q8vr9oq6gzxb2vy75coe.png

category code

<?php wp_list_categories('depth=3&exclude=1&hide_empty=0&orderby=name&show_count=0&use_desc_for_title=1&title_li='); ?>
        					</ul>
                            <?php
                        }
                    ?>