wp editor formatting

I am writing a plugin and have this code:

$settings = array("media_buttons" => false, "wpautop" => false, "teeny" => true);
wp_editor("", "viddesc", $settings);

The problem is when I paste this in wp editor:

<span class='infoTitle'>Nulla mauris justo</span>

And save it, it becomes this:

<p>&lt;span class='infoTitle'&gt;Nulla mauris justo&lt;/span&gt;</p>

Is there a away to avoid adding p tags and converting <> characters?

Thank you.