Update header.html

_includes/header.html

@@ -18,7 +18,7 @@
 	    	{% endif %}
 		{% endfor %}
 		{% for page in site.pages %}
-		    {% if page.layout != "home" %}
+		    {% if page.layout != "home" and page.nav-menu == true %}
 		        <li><a href="{{ page.url | absolute_url }}">{{ page.title }}</a></li>
 		    {% endif %}
 		{% endfor %}