Only check if first category is Urlaub

functions.php

@@ -12,11 +12,6 @@ function td_theme_styles() {
     );
 }
 
-// map to name function
-function map_to_name($element) {
-    return $element['name'];
-}
-
 // Add google API key
 function my_acf_google_map_api( $api ){
 	$api['key'] = 'AIzaSyDHNT102YHu-TP50F78bPyvf5ia6K6cjU8';

single.php

@@ -48,7 +48,7 @@
 				    
 				    <div class="clear"></div>
 
-					<?php if ( in_array('Urlaub', array_map('map_to_name', get_the_category())) ) : ?>
+					<?php if ( get_the_category[0]['name'] == 'Urlaub' ) : ?>
 						<table>
 							<tr>
 								<th>Land</th>