Get Category

loop.php

// A nice, way to display linked categories is by using a comma as separator
<?php the_category( ', ' ); ?>

// The separator will not be added after the last linked category. By using the following reasoning, each of the linked categories can also be enclosed, for example, in a <div> element:
<?php the_category( '</div><div>' ); ?>

// or to use the linked categories in a sentence:
This post has <?php the_category( ', ' ); ?> as categories.

// The simplest way to display a category, or a list of categories, without links is by using the following code:
<?php
  // to display categories without a link
  foreach ( ( get_the_category() ) as $category ) {
    echo $category->cat_name . ' ';
  }
?>