button" id="dropdownMenu3" data-toggle="dropdown" aria-expanded="true">Dropdown with disabled link <span class="caret"></span></button>
    <ul aria-labelledby="dropdownMenu3" role="menu" class="dropdown-menu">
        <li role="presentation"><a href="javascript:void(0);" tabindex="-1" role="menuitem">Regular link</a></li>
        <li class="disabled" role="presentation"><a href="javascript:void(0);" tabindex="-1" role="menuitem">Disabled link</a></li>
        <li role="presentation"><a href="javascript:voi