title: can't get all p:accordionPanel tabs closed by default
body: <p>I can't get all p:accordionPanel tabs closed</p>
  
  <p>I tried both solutions recommended in Question <a href="https://stackoverflow.com/q/10189246/999750">Hiding the first tab of accordion panel in JSF Primefaces</a>
  but it does not work for me in case the value attribute of the accordionPanel is an EL expression. the first tab is always open.</p>
  
  <p>I tried </p>
  
  <pre><code>&lt;p:accordionPanel widgetVar="accordion" 
  multiple="true" 
  value="#{cc.attrs.managedBean.getTabs()}" var="r"&gt;
  </code></pre>
  
  <p>without success</p>
  
  <p>and </p>
  
  <pre><code>&lt;p:accordionPanel activeIndex="-1" 
  multiple="true" value="#{cc.attrs.managedBean.getTabs()}" var="r"&gt;
  </code></pre>
  
  <p>works only if there is no value attribut of accordionPanel</p>
  
  <p>thanks for any help.</p>
  
  <p>I have primesfaces 3.3.1</p>