title: Regular expression to escape double quotes within double quotes
body: <p>I have a string that needs to be parsed as JSON.</p>
  
  <p>The problem is, it may sometimes contain double quotes, causing errors in parsing.</p>
  
  <p>For example:</p>
  
  <pre><code>{
      "id_clients":"58844",
  
      "id_clients_name" : ""100" test"qw"
  }
  </code></pre>
  
  <p>I need a regex to replace any double quotes between the opening and closing <code>"</code> with a <code>\"</code>.</p>
  
  <p>Thanks.</p>