Drupal 7 Custom Views Layout - theme_preprocess_views_view_fields()

function NAME-OF-THEME_preprocess_views_view_fields(&$vars, $hook){
 
// machine name of view
if ($vars['view']->name == 'homepage_slideshow') {
 
    // add a wrapper before a certain field
    $vars['fields']['field_slide_image']->wrapper_prefix = '<div class="slideshow-content-wrapper-left">' . $vars['fields']['field_slide_image']->wrapper_prefix;
 
    // add a wrapper after the same field
    $vars['fields']['field_slide_image']->wrapper_suffix .= '</div>';
 
 
 
    // add a wrapper before a certain field
    $vars['fields']['title']->wrapper_prefix = '<div class="slideshow-content-wrapper-right">' . $vars['fields']['title']->wrapper_prefix;
 
    // add the closing tag for the wrapper we created above
    $vars['fields']['field_button_link']->wrapper_suffix .= '</div>';
 
 
  }
}