adding logic to Nav Style Options

only display max mega menu if plugin is active.

inc/customizer-nav.php

@@ -1,23 +1,37 @@
 <?php 
 $wp_customize->add_setting( 'navoption1', //Give it a SERIALIZED name (so all theme settings can live under one db record)
-         array(
-            'default' => 'drop', //Default setting/value to save
-            'type' => 'option', //Is this an 'option' or a 'theme_mod'?
-            'capability' => 'edit_theme_options', //Optional. Special permissions for accessing this setting.
-            'transport' => 'refresh', //What triggers a refresh of the setting? 'refresh' or 'postMessage' (instant)?
-         ) 
-      ); 
-	$wp_customize->add_control('navoption1', array(
-        'type' => 'select',
-        'label' => 'Navigation Option 1',
-        'section' => 'nav',
-        'choices' => array(
-           'drop'=>'Dropdowns',
-			'drop-multi' => 'Multi-level Dropdowns',
-			'tabs'=>'Tabs',
-			'maxmegamenu'=>'Maxmegamenu Dropdown',		
-			'left'=>'Left Only'			
-        	)
-    	)
-	);
+	array(
+		'default' => 'drop', //Default setting/value to save
+		'type' => 'option', //Is this an 'option' or a 'theme_mod'?
+		'capability' => 'edit_theme_options', //Optional. Special permissions for accessing this setting.
+		'transport' => 'refresh', //What triggers a refresh of the setting? 'refresh' or 'postMessage' (instant)?
+	) 
+);
+
+
+// Setup Navigation options as an array
+$navStyleOptions = array(
+	'drop'=>'Dropdowns',
+	'drop-multi' => 'Multi-level Dropdowns',
+	'tabs'=>'Tabs'
+);
+
+// Check to see if max mega menu is active
+include_once( ABSPATH . 'wp-admin/includes/plugin.php' );
+$maxMegaMenuActive = is_plugin_active('megamenu/megamenu.php');
+
+// If it's active, add that option to the array. 
+if ($maxMegaMenuActive){
+	$navStyleOptions['maxmegamenu'] = 'Maxmegamenu Dropdown';
+};
+
+// create the nav style options using the array. 
+$wp_customize->add_control('navoption1', array(
+	'type' => 'select',
+	'label' => 'Navigation Style',
+	'section' => 'nav',
+	'choices' => $navStyleOptions
+	)
+);
+
 ?>