how to add none text

How do I add a none text in the php template using this code <?php echo c2c_get_custom('Gallery'); ?>?

This is nested in the loop.

<ul id="gallery-container">
				<?php
				    global $post;
				    $post_slug = get_the_title($post->post_parent);
					$args = array ( 'category_name' => $post_slug, 'posts_per_page' => -1, 'orderby' => title, 'order' => ASC);
					$myposts = get_posts( $args );
						foreach( $myposts as $post ) :	setup_postdata($post); ?>
					<li data-id="<?php the_ID(); ?>">
						<h3><?php the_title(); ?></h3>
						<?php if (c2c_get_custom('Gallery')): ?>
							<?php echo c2c_get_custom('Gallery'); ?>
						<?php else : ?>
						<?php endif; ?>
					</li>
				<?php wp_reset_postdata(); ?>
				<?php endforeach; ?>
			</ul>