<section class="cat-cloud">
<?php
  $categories = get_categories( array(
    'orderby' => 'name',
    'order'   => 'ASC')
  );

foreach( $categories as $category ) {
  $catg_link = esc_url( get_category_link( $category->term_id ) );
  $catg_name = esc_html( $category->name );
  echo "<a href='". $catg_link ."'><span class='tag'>". $catg_name ."</span></a>";
}
?>
</section>