how to add content to the custom item in course menu ?

Please refer : https://wplms.io/support/knowledge-base/adding-custom-section-in-course-menu/

You have to add the content here in this function from that tip  : function wplms_course_custom_section_area(){ if(!isset($_GET['action']) || ($_GET['action'] != 'custom') ) return;   echo '<h3 class="heading">'.__('Custom Nav Section','vibe').'</h3>'; echo ' <p> this is my custom content etc </p> <p>This is another paragraph </p> '; } But unfortunately this will not work properly as of now as we have switched to pretty permalinks in course and the tip is very old . so we will update this tip and also improve it so that you can do more customization using that tip.

Yes we are  developing a plugin for this, you can add custom sections for different courses and and can do many more things with this plugin. Then you don't have to use the tip any more and you can use the simple plugin for this. This plugin will be released by the end of this week.

@adminsnstrainings: Yes this plugin was released previous month. You can download the plugin from here: https://wplms.io/support/knowledge-base/wplms-course-custom-nav-plugin/ You can create your own topic if you face any issue.