Search code in menu bar

Envato Customers Web and Code
1

Please can anyone help me how to fix search in this code…

                  <a href="#" class="x-search x-search-trigger navbar-link" style="display: block;"><i class="icon-search3" title="Search Al Kadamany World"></i></a>
                  <a href="#" class="x-search x-search-close navbar-link" style="display: none;"><i class="icon-line-cross"></i></a>

              </div>

I want to add my form …\\

Thank you