a.dropdown-toggleをdiv.dropdown-toggleに置き換えて動作させました。
CSSは良くないですが、私はあなたがこの権利を行えると信じています。
はここで...コード
<div class="collapse navbar-collapse" id="tb-nav-collapse">
<ul class="nav navbar-nav navbar-right">
<li><a class="page-scroll" href="http://www.romaheritage.co.uk/#about">About</a></li>
<li class="dropdown">
<!-- Change a to div -->
<div class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Records <span class="caret"></span></div>
<ul class="dropdown-menu">
<li><a href="http://www.romaheritage.co.uk/parish-records">BMD</a></li>
<li><a href="http://www.romaheritage.co.uk/census-records">Census</a></li>
</ul>
</li>
<li><a class="page-scroll" href="http://www.romaheritage.co.uk/newspaper-articles">Newspapers</a></li>
<li><a class="page-scroll" href="http://www.romaheritage.co.uk/#blog">Blog</a></li>
<li class="dropdown">
<!-- Change a to div -->
<div class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Misc. <span class="caret"></span></div>
<ul class="dropdown-menu">
<li><a href="http://www.romaheritage.co.uk/queen-victorias-journals">Queen Victorias Journals</a></li>
</ul>
</li>
<li><a class="page-scroll" href="http://www.romaheritage.co.uk/#contact">Contact</a></li>
</ul>
</div>