Bootstrap 3 Multi-column within a single ul not floating properly

Question

I have been encountering problems like this on the current bootstrap 3 for a while now. I have managed to fix them in the past in one way or another but have no clue of how

Answer 1

Thanks, Varun Rathore. It works perfectly!

For those who want graceful collapse from 4 items per row to 2 items per row depending on the screen width:

    
Cell_1
    
Cell_2
    
Cell_3
    
Cell_4
    
Cell_5
    
Cell_6
    
Cell_7