如何在Yii的chtml :: image htmloptions中添加非HTML属性

I am trying to add non HTML attribute in htmlOptions array of Yii's CHTML::image($url, $alt, $htmlOptions), but in rendered page these attributes does not get added.

Basically i want to use lazy loading of images which needs to store original image url in 'data-origional' and a placeholder in SRC tag. attribute. For some reasons i can't use a direct HTML <img /> tag in my code.

Thanks for any suggestions guys.

This code works fine:

echo CHtml::image('http://google.com/images/srpr/logo3w.png', '', array(
    'data-original' => 'original',
    'another-attribute' => 'bla-bla-bla',
));

It returns:

<img 
     alt="" src="http://google.com/images/srpr/logo3w.png"
     another-attribute="bla-bla-bla"
     data-original="original"
>