title: Regular expression replace a word by a link
body: <p>I want to write a regular expression that will replace the word Paris by a link, for only the word is not ready a part of a link.</p>
  
  <p>Example:</p>
  
  <pre><code>    i'm living &lt;a href="Paris" atl="Paris link"&gt;in Paris&lt;/a&gt;, near Paris &lt;a href="gare"&gt;Gare du Nord&lt;/a&gt;,  i love Paris.
  </code></pre>
  
  <p>would become </p>
  
  <pre><code>    i'm living.........near &lt;a href=""&gt;Paris&lt;/a&gt;..........i love &lt;a href=""&gt;Paris&lt;/a&gt;.
  </code></pre>