how to edit top menu in PS 1.6

[haotiger]

Hi, all.

in prestashop 1.6, most of top menu show sub menu as one row.

but sub menu of third top menu item shows as two rows.

for example:

1            2              3    

1-1   1-2   1-3

 

1            2              3    

            3-1        3-2  

            3-3

 

i want to display as one row. (3-1   3-2   3-3 )

how to do this ?