Prevent urls from being appended


I have the following:

<a href="" target="_blank">
	<span class="nt-share nt-share-twitter-1"></span>

What the client wants in the tweet:
Check this out: @usertag

What shows up:
Check this out: @usertag

I found the following, but there is nothing in that discussion that helps.

Is there anyway to prevent twitter from appending the second URL ?