YES I KNOW BOOTSTRAP
Hi..
I am a Zend Certified PHP developer. I am having 10 years of experience in the development of the website and application based on browser. I have developed various websites using Core PHP, Custom PHP, Ajax, JQuey, Javascript,JSON, Shard technique, SSL etc.
I understand your requirement of showing the Menu only on the desktop version which I can do.
Regarding the other things such as suggestion for increase page speed I have to check the analysis and modification required for this. Can you please share the website URL or some online checking application which have done the page speed analysis.
Regards,
ZealTechno Web Solutions Pvt Ltd