Андрей Брекоткин

$str = preg_replace('#<a[^>]+href="https?://site\.ru/catalog/razdel/[^>]+>(.*?)</a>#si', '$1', $str);

<ul class="list-group" id="myTabs">
                                <a href="#" class="list-group-item">Создание</a>
                                <ul>
                                    <li><a data-toggle="tab" href="#KK1">КК</a></li>
                                    <li><a data-toggle="tab" href="#gugf1">ГУ/ГФ</a></li>
                                </ul>  
                            </ul>

<div class="tab-content">
                    <div class="col-md-9">
                          <div id="KK1" class="panel panel-default tab-pane fade in active">

<div class="col-md-9">
       <div class="tab-content">
                  <div id="KK1" class="panel panel-default tab-pane fade in active">
                  </div>
                   <div id="gugf1" class="panel panel-default tab-pane fade">
       </div>
</div>