I have done bachelors and wanted to know if getting cmp certification equals to 4500 credit hours required for pmp
I'm going to answer this assuming you mean Certified Meeting Planner. If that's not the case, my apologies.
TL;DR- Absolutely! In my opinion event planning is a highly specialized kind of project management.
My wife was an event planner for a long time. She went through the process to become a CMP and between that and watching her plan and run large events, I know she'd be an awesome project manager and that the hours she put into doing events would apply as projects.
Just remember, PMI doesn't care if you have a CMP. It is just that the same kind of work you did that qualified for a CMP application is also going to be usable in the PMP application.