Hello,how can i remove:
1:From the left,that menu ?
2:From the middle,that white space ?
See pictures:
Thank you.

@rox
Whitespace is created by left menu that is too long.
You can remove list of locations by adding following code to your style.css:
#loc {display:none;}

I am also concerned about the issue
How to drag the left block of the list of cities in the middle of a horizontal type

@emma233
Do it in main.php. Additional styling is required, therefore I will not provide any guide there.