Originally I thought it would be a very simple fix, but looks like you can't define a, a:hover in an inline style. Can still be a somewhat workable mod, but you'd have to script up something to look for all a tags within the span tag and add styles to them.
Code:
From:
<span style="color:white; background-color:white; cursor: help;
border: 1px #5656ef dashed;"
onclick="this.style.backgroundColor='transparent';
this.style.color='black';">
<a href="http://www.google.com" target="_blank">
Google</a></span>
To:
<span style="color:white; background-color:white; cursor: help;
border: 1px #5656ef dashed;"
onclick="this.style.backgroundColor='transparent';
this.style.color='black';">
<a href="http://www.google.com" target="_blank"
style="color:white; background-color:white; cursor: help;
border: 1px #5656ef dashed;"
onclick="this.style.backgroundColor='transparent';
this.style.color='blue';">
Google</a></span>