benedictec on "Pictures showing on footer but not widget?"

Hi everyone!

I am currently struggling with some images (actually social media ones). When I add the following code to my "footer.php" document, it clearly appears but when I add it to the Text/HTML widget it doesn't, the images don't appear but still I can click on it and it well link me to the webpages. Do you know where this come from?

Otherwise, on the footer it currently appears on the left side, how could I move it to the right one then?

Many thanks everyone!

<a href="https://twitter.com/BroadgateF" target="_blank" rel="nofollow"><img src="<?php echo get_template_directory_uri(); ?>/images/twitter3.png"></a>
          <a href="http://th.linkedin.com/in/brodgatefinancial" target="_blank" rel="nofollow"><img src="<?php echo get_template_directory_uri(); ?>/images/linkedin2.png"></a>
           <a href="https://www.facebook.com/Broadgategroup" target="_blank" rel="nofollow"><img src="<?php echo get_template_directory_uri(); ?>/images/googleplus.png"></a>
          <a href="http://www.youtube.com/user/BroadgateGroup?feature=mhee" target="_blank" rel="nofollow"><img src="<?php echo get_template_directory_uri(); ?>/images/youtube.png"></a>