Word "Array" is Appearing on Blog Posts Page - php

Question

I'm getting the word "Array" coming up on my blog POSTS page when I use the below code. I have a feeling that it relates to this line:
I am using a similar template for my PORTFOLIO and NEWS pages where the wording is slightly different on this line ("showportcat" and "shownewscat" instead of "get_the_category") and it should be displaying the categories but instead, the word 'array' is in it's place.
I've tried "showpostcat" but that didnt' work so I wonder if I need to be re-wording it? Or maybe the problem is on another part of the code which I've included below?
<div class="greyblock">
<h4 class="nomar"><?php echo the_title(); ?></h4>
<div class="sep"></div>
<?php echo get_the_category(get_the_ID()); ?>
<div class="clear"></div>
<ul class="blogpost_list columns2">
<?php
$temp = $wp_query;
$wp_query = null;
$wp_query = new WP_Query();
$args = array(
'post_type' => 'post',
'paged' => $paged,
'posts_per_page' => get_option("posts_per_page"),
);
if (isset($_GET['slug'])) {
$args['tax_query']=array(
array(
'taxonomy' => 'postcat',
'field' => 'slug',
'terms' => $_GET['slug']
)
);
}
$wp_query->query($args);
?>
<?php while ( $wp_query->have_posts() ) : $wp_query->the_post();
#We have:
#get_permalink() - Full url to post;
#get_the_title() - Post title;
#get_the_content() - Post text;
#get_post_time('U', true) - unix timestamp
$featured_image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'single-post-thumbnail' );
echo "
<li class='pc'>
<img alt='".get_the_title()."' src='".TIMTHUMBURL."?w=400&h=400&src=".$featured_image[0]."'>
<h4>".get_the_title()."</h4>";
$terms = get_the_terms($post->ID, 'postcat');
if ( $terms && ! is_wp_error( $terms ) ) {
$draught_links = array();
foreach ( $terms as $term ) {
$draught_links[] = $term->name;
}
$on_draught = join( ", ", $draught_links );
}
echo "
<p>".get_the_excerpt()."</p>
<a href='".get_permalink()."' class='read'>Read more</a>
<br class='clear' />
</li>
";
endwhile; ?>
</ul>
</div>
<?php get_pagination() ?>
<?php $wp_query = null; $wp_query = $temp; ?>

Answer 1

How about:
$categories = get_the_category(get_the_ID());
foreach ($categories as $category) {
echo $category;
}

Answer 2

The problem is still there. I'm guessing it relates to the way I am wording one of the below two lines as it is 'showportcat' for portfolios and 'shownewscat' for news but 'showpostcat' doesn't work for posts so I just can't figure it out:
<?php echo get_the_category(get_the_ID()); ?>
**OR**
'taxonomy' => 'postcat',