Define widget output

echo $args and content.php

<?php 
echo $args['before_widget'] . $args['before_title'] . $title . $args['after_title']; ?>

<div class="row">

  <div class="col-lg-6"><?php
    foreach( $cat_col_one as $cat_one ) {
      echo $cat_one;
    } ?>
  </div>

  <div class="col-lg-6"><?php 
    foreach( $cat_col_two as $cat_two ) {
      echo $cat_two;
    } ?>
  </div>

</div><?php

echo $args['after_widget'];
?>