Create a submenu for the left menu？like
Your question needs more explanation. Can you please describe it more ? As far as I understand there is no way to create a custom menu on sidebar of Kibana currently. You would have to write some custom code for that.
As far as Kibana plugin development is concerned, here are some references you could use:
This tutorial series explains how to create own Kibana plugins. This part explains how to create a custom application plugin.
hi， How to add submenu to navigation on the left of kinaba7.0 ，Details can be found in attachment，thanks
Am afraid, as I said earlier there is no better way than building your own Kibana Plugin. Here's an excellent resource for getting started writing a Kibana plugin: