How do I change/edit the categories displayed in detail sidebar?

Hi

I managed to find by searching through the core plugin for days (lol) where to replace the category list in main section with category icons as seen below

Where do I find the code that builds the category list in the detail side bar?

I would prefer to JUST show the categories in the sidebar and not on the main section?

I had to edit line 620 onwards in geodirectory_template_actions.php as per code below which is not the way to do it, how can i add this rather in my functions.php?

									$links[] = "<a href='".esc_attr( get_term_link($term,$post_taxonomy) ) . "'>$term->name";
									
									// **************************************greg************************************** //
									
									$linky[] = '<a href='.esc_attr( get_term_link($term,$post_taxonomy) ) . '><img src="http://mysocial.buzz/wp-content/uploads/2014/10/catx_'.$term->name.'.png" alt="'.$term->name.'"/></a>';
									
									$terms[] = $term;
									}
								endif;
							}
							// order alphabetically
							asort($links);
							foreach (array_keys($links) as $key) {
								$termsOrdered[$key] = $terms[$key] ;
							}
							$terms = $termsOrdered;
							
						}
					
						if(!isset($listing_label)){$listing_label='';}

						// **************************************greg************************************** //

                        //$taxonomies[$post_taxonomy] = wp_sprintf('%s: %l', ucwords($listing_label.' '. __('Category' , GEODIRECTORY_TEXTDOMAIN)), $links, (object)$terms);
						$taxonomies[$post_taxonomy] = wp_sprintf('%s %l', ucwords(__('' , GEODIRECTORY_TEXTDOMAIN)), $linky, (object)$terms);
						
                    }