title: i want to add string data to before first character and after last character
body: <p>Shortly i have string variable similar to this:(every li elements is array element.)</p>
  
  <pre><code>&lt;li&gt;first&lt;/li&gt;
  &lt;li&gt;second&lt;/li&gt;
  .
  .
  .
  </code></pre>
  
  <p>I want get:</p>
  
  <pre><code>&lt;ul&gt;
  &lt;li&gt;first&lt;/li&gt;
  &lt;li&gt;second&lt;/li&gt;
      .
      .
      .
  &lt;/ul&gt;
  </code></pre>
  
  <p>But require add string data's start and end for this avaible..</p>