title: javascript or jquery: unwrap only one child, keep wrapper on other children
body: <p>I have simple DOM</p>
  <p><code>&lt;b&gt;&lt;i&gt;node one&lt;/i&gt;&lt;i&gt;&lt;s&gt;node two&lt;/s&gt;&lt;/i&gt;node three&lt;/b&gt;</code>.</p>
  <p>How do I remove all wrappers from only one element (for example: node two) so that other elements remain in their wrappers. The final DOM should become</p>
  <p><code>&lt;b&gt;&lt;i&gt;node one&lt;/i&gt;&lt;/b&gt; node two &lt;b&gt;node three&lt;/b&gt;</code></p>
  <p>Jquery method <code>unwrap()</code> in loop destroy top <code>b</code> for all</p>