collapsible sitemap

HTML

<div class="sitemap">
  <ul>
    <li> <span>1</span> <a href="#">link</a>

      <ul>
        <li> <span>2</span> <a href="#">link</a>

          <ul>
            <li><i class="fa icon-plus-sign"></i> <span>3</span> <a href="#">link</a>

            </li>
          </ul>
        </li>
        <li> <span>2</span> <a href="#">link</a>

          <ul>
            <li> <span>3</span> <a href="#">link</a>

            </li>
            <li> <span>3</span> <a href="#">link</a>

              <ul>
                <li> <span>4</span> <a href="#">link</a>

                  <ul>
                    <li> <span>5</span> <a href="#">link</a>

                    </li>
                    <li> <span>5</span> <a href="#">link</a>

                    </li>
                  </ul>
                </li>
                <li> <span>4</span> <a href="#">link</a>

                </li>
                <li> <span>4</span> <a href="#">link</a>

                </li>
              </ul>
            </li>
            <li> <span>3</span> <a href="#">link</a>

            </li>
          </ul>
        </li>
      </ul>
    </li>
  </ul>
</div>

CSS

.sitemap {
  min-height: 20px;
  padding: 19px;
  margin-bottom: 20px;
  background-color: #fbfbfb;
  border: 1px solid #999;
  border-radius: 4px;
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.05);
}

.sitemap li {
  list-style-type: none;
  margin: 0;
  padding: 10px 5px 0 5px;
  position: relative;
}

.sitemap li:before,
.sitemap li:after {
  content: '';
  left: -20px;
  position: absolute;
  right: auto;
}

.sitemap li:before {
  border-left: 1px solid #999;
  bottom: 50px;
  height: 100%;
  top: 0;
  width: 1px;
}

.sitemap li:after {
  border-top: 1px solid #999;
  height: 20px;
  top: 25px;
  width: 25px;
}

.sitemap li span {
  border: 1px solid #999;
  border-radius: 5px;
  display: inline-block;
  padding: 3px 8px;
  text-decoration: none;
}

.sitemap li.parent_li>span {
  cursor: pointer;
}

.sitemap>ul>li:before,
.sitemap>ul>li:after {
  border: 0;
}

.sitemap li:last-child:before {
  height: 26px;
}

.sitemap li.parent_li>span:hover,
.sitemap li.parent_li>span:hover+ul li span {
  background: #eee;
  border: 1px solid #94a0b4;
  color: #000;
}
.icon-plus-sign
{
    font-weight:bold;
    float:right;
    padding-right:4px;
    content:"+";
	}

.icon-minus-sign
{
    font-weight:bold;
    float:right;
    padding-right:4px;
    content:"-"!important;
	}

JavaScript

$(function() {
  $('.sitemap li:has(ul)').addClass('parent_li').find(' > span').attr('title', 'Collapse');
  $('.sitemap li.parent_li > span').on('click', function(e) {
    var children = $(this).parent('li.parent_li').find(' > ul > li');
    if (children.is(":visible")) {
      children.hide('fast');
      $(this).attr('title', 'Expand').find(' > i').addClass('icon-plus-sign').removeClass('icon-minus-sign');
    } else {
      children.show('fast');
      $(this).attr('title', 'Collapse').find(' > i').addClass('icon-minus-sign').removeClass('icon-plus-sign');
    }
    e.stopPropagation();
  });
});