1. Change:
  2. the_post_thumbnail( 'offer_slider' );
  3.  
  4. to
  5.  
  6. echo "<a href='" . get_post_meta($post->ID, 'doover_link', true) . "'>";
  7. the_post_thumbnail( 'offer_slider' );
  8. echo "</a>";
  9.  
  10.  
  11. Change divs to:
  12. <div class="title" style="left: 550px;">
  13. <div style="width:400px; top:0px; left: 0px; position:absolute; z-index:1;">
  14. ...
  15.  
  16. <div class="desc" style="margin-left: 550px;">
  17. <div style="width:400px; top:170px; margin-left: 0px; position:absolute; z-index:4;">