Question about html tags

I downloaded a website template a couple weeks back and was going though it today and noticed bitly="bitly_processed" in all the href tags when I inspect with Firebug. But in the code all I see is ="". I'm confused ...
Any ideas on what this is?

Thanks all.

 

Is the footer encrypted?

 

I dont think so. But I just noticed this line:

<link type="text/css" 
href="http://s.bit.ly/preview.s3.v2.css?v=4.2" 
rel="stylesheet" media="screen">

HTML:

Could that be what is causing it?

Is it something I should be concerned about?

Thx

 

This is the .css sheet that it links to.

.bittip iframe {
width:320px !important;
height:95px !important;
}

span.bittip{
padding: 0 !important;
display:inline !important;
position: absolute;
}

a:hover span.bittip span span{
display: block !important;
}

span.bittip span{
position: absolute !important;
text-decoration: none !important;
}

span.bittip span span{
display: none !important;
position: absolute !important;
z-index: 10000000000 !important;
top: .85em !important;
right:-130px !important;
}

#bitly_top_stripe {
background-color:#333333;
color:#FFFFFF;
height:30px;
margin:0;
position:absolute;
top:0;
width:100%;
}

.bitly_body {
margin-top:30px !important;
}

.bitly_shortened {
position:absolute !important;
border:1px solid #999 !important;
z-index:100000000000 !important;
padding:10px !important;
background:#333 !important;
color:#fff !important;
text-align:left !important;
font-size:12px !important;
line-height:1em !important;

}

.bitly_shortened_span {
font-size:12px !important;
line-height:1em !important;
color:#c93 !important;
}

.bitly_shortened_x {
position:absolute !important;
top:0 !important;
right: 5px !important;
color: #fff !important;
cursor: pointer !important;
}

http://s.bit.ly/preview.s3.v2.css?v=4.2

 

Bit ly is a url shortener Service. maybe it uses that!

 

I figured it out. Although I'm not quite sure how it works.

I had a Firefox Add-on called "bit.ly preview".

Thanks all.