title: Zend_Navigation: how to manage menu items?
body: <p>I have menu like this:</p>
  
  <pre><code>item1
   - item1.1
      - item 1.1.1
      - item 1.1.2
      - item 1.1.3
   - item1.2
      - item 1.2.1
      - item 1.2.2
  item2
   - item2.1
   - item2.2
  </code></pre>
  
  <p>I set `setOnlyActiveBranch(true);
  And if I choose item.1.1.1 or item.1.1 I get this one:</p>
  
  <pre><code>item1
   - item1.1
      - item 1.1.1
      - item 1.1.2
      - item 1.1.3
  </code></pre>
  
  <p>At the same time if I press item1 I got this one:</p>
  
  <pre><code>item1
   - item1.1
   - item1.2
  </code></pre>
  
  <p>I don't want to hide other root nodes if the current node is active. 
  So how to show menu this way (in case I choose item1.1. for example)?:</p>
  
  <pre><code>item1
   - item1.1
      - item 1.1.1
      - item 1.1.2
      - item 1.1.3
   - item1.2
  item2
  </code></pre>
  
  <p>Is it possible to to it via standart methods or should I create new helper?</p>