Your option
elements look like:
<option value="it"><span class="lang-row sys-disablePropragation" rel="http://it.captaincookresorts.com" onclick="window.location=jQuery(this).attr('rel');" title="Italiano"><span class="langcode">IT</span><span class="ico-flag flag-it"></span></span></option>
Instead, you probably want something like:
<option value="it">Italiano</option>
The content model of option
elements is "Text", so they can’t contain HTML/JavaScript.