$(document).ready(function() {
$("div.bhoechie-tab-menu>div.list-group>a").click(function(e) {
    e.preventDefault();
    $(this).siblings('a.active').removeClass("active");
    $(this).addClass("active");
    var index = $(this).index();
    $("div.bhoechie-tab>div.bhoechie-tab-content").removeClass("active");
    $("div.bhoechie-tab>div.bhoechie-tab-content").eq(index).addClass("active");
});
});

<div class="bhoechie-tab-menu">
<div class="list-group">
<a href="#" class="list-group-item active "> TAB1 </a> <a href="#" class="list-group-item "> TAB2 </a> <a href="#" class="list-group-item ">TAB1 </a> <a href="#" class="list-group-item"> TAB1 </a>
<div>
<div class="bhoechie-tab">
  <div class="bhoechie-tab-content active">
    <section> </section>
  </div>
  <div class="bhoechie-tab-content">
    <section> </section>
  </div>
  <div class="bhoechie-tab-content">
    <section> </section>
  </div>
  <div class="bhoechie-tab-content">
    <section> </section>
  </div>
</div>

function showVehicle(id){
var container = $("#id_administrator");
var form = "";
$.ajax({
    url: "forms/show.php",
    type:'POST',
    data:{"vreg":id},
    async:false,
    }).done(function(data){
        form= data;
    });

 container.html(form);
}