Removing link from one parent category in main menu

I don't want the parent category(one particular) to link to a new page just want to show the subcategory popup when someone clicks on the parent category.

Can anyone help me?

If no extensions do exist on the Marketplace that suits your needs, you could create a new service request in the Commercial Support section of the forum to get this done as a custom job. Idealistically, this could be accomplished the same way as the controller paging class from v3.1x unofficial release. However, also ensure to add in your OC version and URL to elaborate the details.