Menu accordion

Bonjour je fait un menu accordion pour un resto , le problème le menu 1 et 2 disparaissent quand je clique sur menu 1 ou 2 mais pas les autres menus , qui restent eux ouvert , je voudrait que dès que l on clic sur un menu les autres se ferment automatiquement comme le menu 1 et 2 , ma deuxième question est ce normale d'utiliser autant de <div> ou il y a t il plus simple
merci de votre aide

html :

<section id="price">
<div class="container">
<div class="row">
<div class="col-md-12">
  <div class="block">
    <h1 class="heading wow fadeInUp" data-wow-duration="300ms" data-wow-delay="300ms">Notre carte</h1>
    <p>Tous nos plats sont préparés au moment même, nous vous demandons
      un peu de patience afin de nous laisser le temps de les confectionner , Merci</p>
   
   
   
    <div class="panel-group" id="accordion1">
      <div class="panel panel-default">
        <div class="panel-heading">
          <h4 class="panel-title"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion1" href="#collapseOne1" rel="nofollow" target="_blank"> Menu 1 </a> </h4>
        </div>
        <div id="collapseOne1" class="panel-collapse collapse">
        <div class="panel-body"> menu1 </div>
        </div>
      </div>
      <div class="panel panel-default">
        <div class="panel-heading">
          <h4 class="panel-title"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion1" href="#collapseTwo2" rel="nofollow" target="_blank"> Menu2 </a> </h4>
        </div>
        <div id="collapseTwo2" class="panel-collapse collapse">
          <div class="panel-body"> menu2 </div>
        </div></div>
      
      
      
      
      
      <div class="panel panel-default">
        <div class="panel-heading">
          <h4 class="panel-title">
          <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion1" > Les entrées </a></h4>
          
          <div class="panel panel-default">
            <div class="panel-heading">
              <h4 class="panel-title"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion1" href="#collapseTwo3" rel="nofollow" target="_blank"> Chaudes </a> </h4>
          <div id="collapseTwo3" class="panel-collapse collapse">
          <div class="panel-body"> teste </div></div></div>
  
        <div class="panel panel-default">
            <div class="panel-heading">
              <h4 class="panel-title"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion1" href="#collapseTwo4" rel="nofollow" target="_blank"> Froides </a> </h4>
          <div id="collapseTwo4" class="panel-collapse collapse">
          <div class="panel-body"> teste </div></div></div>
     
            <div class="panel panel-default">
            <div class="panel-heading">
              <h4 class="panel-title"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion1" href="#collapseTwo5" rel="nofollow" target="_blank"> Les potages </a> </h4>
          <div id="collapseTwo5" class="panel-collapse collapse">
          <div class="panel-body"> teste </div></div></div></div></div></div></div></div>
          
     
      <div class="panel panel-default">
        <div class="panel-heading">
          <h4 class="panel-title">
          <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion1" > Les Viandes </a></h4>
          
            <div class="panel panel-default">
            <div class="panel-heading">
              <h4 class="panel-title"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion1" href="#collapseTwo6" rel="nofollow" target="_blank"> Boeuf </a> </h4>
          <div id="collapseTwo6" class="panel-collapse collapse">
          <div class="panel-body"> teste </div></div></div>
  
        <div class="panel panel-default">
            <div class="panel-heading">
              <h4 class="panel-title"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion1" href="#collapseTwo7" rel="nofollow" target="_blank"> Porc </a> </h4>
          <div id="collapseTwo7" class="panel-collapse collapse">
          <div class="panel-body"> teste </div></div></div>
     
            <div class="panel panel-default">
            <div class="panel-heading">
              <h4 class="panel-title"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion1" href="#collapseTwo8" rel="nofollow" target="_blank"> Poulet </a> </h4>
          <div id="collapseTwo8" class="panel-collapse collapse">
          <div class="panel-body"> teste </div></div></div>
          </div></div></div></div></div></div></div></div></div></div>
        
         </section>