Requirements 

Yii 1.1.x
PHP 5.3

Install 

Extract to extensions directory
Add as component to main config
'mailto'=>array('class' =>'application.extensions.mailto.Mailto'),

Usage 

$options = array(
    'cc' => '[email protected]',
    'bcc' => '[email protected]',
    'followupto' => '[email protected]',
    'subject' => 'The Subject',
    'newsgroup' => 'newsgroup',
    'class' => 'emailLinkClass',
    'id' => 'emailLinkID',
    'name' => 'emailLinkName',
    'title' => 'emailLinkTitle',
);
 
Yii::app()->mailto->link('[email protected]', 'javascript', 'Link Text', $options);