Twitter Bootstrap Button Text Word Wrap

For the life of me I am unable to get these twitter bootstrap buttons to text wrap onto multiple lines, they appearing like so.

I cannot post images, so this is what it is doing...

[This is the bu] tton text

I would like it to appear like

[This is the ]

[button text ]

<div class="col-lg-3"> <!-- FIRST COL -->
  <div class="panel panel-default">
    <div class="panel-body"> 
    <h4>Posted on</h4>
    <p>22nd September 2013</p>
    <h4>Tags</h4>
    <a href="#" class="btn btn-primary btn-xs col-lg-12" style="margin-bottom:4px;">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</a>
   <a href="#" class="btn btn-primary btn-xs col-lg-12" style="margin-bottom:4px;">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</a>
   <a href="#" class="btn btn-primary btn-xs col-lg-12" style="margin-bottom:4px;">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</a>
           </div>
  </div>
</div>

Any help would be much appreciated.

Edit. I have tried adding word-wrap:break-word; but it is not making any difference.

Edit. JSFiddle http://jsfiddle.net/TTKtb/ - You will need it expand the right column so the panels sit next to one another.

Try this: add white-space: normal; to the style definition of the Bootstrap Button or you can replace the code you displayed with the one below

<div class="col-lg-3"> <!-- FIRST COL -->
  <div class="panel panel-default">
    <div class="panel-body"> 
    <h4>Posted on</h4>
    <p>22nd September 2013</p>
    <h4>Tags</h4>
    <a href="#" class="btn btn-primary btn-xs col-lg-12" style="margin-bottom:4px;white-space: normal;">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</a>
   <a href="#" class="btn btn-primary btn-xs col-lg-12" style="margin-bottom:4px;white-space: normal;">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</a>
   <a href="#" class="btn btn-primary btn-xs col-lg-12" style="margin-bottom:4px;white-space: normal;">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</a>
           </div>
  </div>
</div>

I have updated your fiddle here to show how it comes out.

You can simply add this class.

.btn {
    white-space:normal !important;
    word-wrap: break-word; 
}

FWIW, in Boostrap 4.4, you can add .text-wrap style to things like buttons:

   <a href="#" class="btn btn-primary text-wrap">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</a>

https://getbootstrap.com/docs/4.4/utilities/text/#text-wrapping-and-overflow

You can add these style's and it works just as expected.

.btn {
    white-space:normal !important; 
    word-wrap: break-word; 
    word-break: normal;
}