Wordress Get All Tags

 <?php

        $tags = get_tags(array(
            'smallest'                  => 10, 
            'largest'                   => 22,
            'unit'                      => 'px', 
            'number'                    => 10,  
            'format'                    => 'flat',
            'separator'                 => " ",
            'orderby'                   => 'count', 
            'order'                     => 'DESC',
            'show_count'                => 1,
            'echo'                      => false
        ));
        echo '<ul class="AddYourClassUl">';
        foreach ($tags as $tag) {
        echo '<li class="AddYourClassLi">' . $tag->name . '</li>';
        }
        echo '</ul>';
    ?>