Custom content finder tab in adobe cq5

I have created a custom content finder tab in Adobe Experience Manager cq5 referring the page https://helpx.adobe.com/experience-manager/kb/CustomCFTab.html.

I have two tabs that display the contents from the paths as below:

tab 1=a/b and tab 2= a/b/c

Now I want tab 1 not to display the content under a/b/c. In other words, tab 1 should exclude a specific subfolder under it.

I played around the URL entry but was not successful,

“URL”: “/bin/wcm/content finder/asset/view.json/a/b/”

Any help in this regard is greatly appreciated.

Thanks

Is this an XD plugin related question?