Navigation bar issue

Hi, I am facing some serious issues with the navigation bar of the website. I want to split the navigation bar in 2 parts of the screen, one part on the left and the other part on the right side of the screen. Between these splitted navigation bars, I want to add a section. I have tried many ways, such as "top: 0;" and "bottom: 300px", etc. but it is still not working. I have managed to get the navigation bar at the right side of the screen, but the actual issue, is, that I can`t move the right side navigation bar in the top of the screen, it shows below the left side navigation bar. Can anybody help me solve this issue, as this issue, is really annoying me.