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        <?php
          $prev = mod_get_adjacent_post('prev', array('post'));
          $next = mod_get_adjacent_post('next', array('post'));
        ?>
        <div class="col-md-3 post__paginations">
          <?php if($prev) : ?>
            <a href="<?php echo get_permalink( $prev->ID ); ?>">Предыдущая статья</a>
          <?php endif; ?>
        </div>

        <div class="col-md-3 col-md-offset-6 post__paginations post__paginations-reverse">
          <?php if($next) : ?>
            <a href="<?php echo get_permalink($next->ID)?>">Следующая статья</a>
          <?php endif; ?>
        </div>

/* Source: http://stackoverflow.com/questions/10376891/make-get-adjacent-post-work-across-custom-post-types */
/* Copiar esto en functions.php */
/*
 * Replacement for get_adjacent_post()
 *
 * This supports only the custom post types you identify and does not
 * look at categories anymore. This allows you to go from one custom post type
 * to another which was not possible with the default get_adjacent_post().
 * Orig: wp-includes/link-template.php
 *
 * @param string $direction: Can be either 'prev' or 'next'
 * @param multi $post_types: Can be a string or an array of strings
 */
function mod_get_adjacent_post($direction = 'prev', $post_types = 'post') {
  global $post, $wpdb;

  if(empty($post)) return NULL;
  if(!$post_types) return NULL;

  if(is_array($post_types)){
      $txt = '';
      for($i = 0; $i <= count($post_types) - 1; $i++){
          $txt .= "'".$post_types[$i]."'";
          if($i != count($post_types) - 1) $txt .= ', ';
      }
      $post_types = $txt;
  }

  $current_post_date = $post->post_date;

  $join = '';
  $in_same_cat = FALSE;
  $excluded_categories = '';
  $adjacent = $direction == 'prev' ? 'previous' : 'next';
  $op = $direction == 'prev' ? '<' : '>';
  $order = $direction == 'prev' ? 'DESC' : 'ASC';

  $join  = apply_filters( "get_{$adjacent}_post_join", $join, $in_same_cat, $excluded_categories );
  $where = apply_filters( "get_{$adjacent}_post_where", $wpdb->prepare("WHERE p.post_date $op %s AND p.post_type IN({$post_types}) AND p.post_status = 'publish'", $current_post_date), $in_same_cat, $excluded_categories );
  $sort  = apply_filters( "get_{$adjacent}_post_sort", "ORDER BY p.post_date $order LIMIT 1" );

  $query = "SELECT p.* FROM $wpdb->posts AS p $join $where $sort";
  $query_key = 'adjacent_post_' . md5($query);
  $result = wp_cache_get($query_key, 'counts');
  if ( false !== $result )
      return $result;

  $result = $wpdb->get_row("SELECT p.* FROM $wpdb->posts AS p $join $where $sort");
  if ( null === $result )
      $result = '';

  wp_cache_set($query_key, $result, 'counts');
  return $result;
}