how to do this small effect?

[Nick20000]

hi. on my menu bar just something really small i would like the line that separates each link Categories to be smaller and not meet with the top and bottom borders, picture added.

 

http://www.shopmost.co.uk

 

ty.

[Nick20000]

hi.

 

how could i do this effect?

 

ty.

[vekia]

in: http://www.shopmost.co.uk/modules/blocktopmenu/css/superfish-modified.css change:

.sf-menu li {
float: left;
position: relative;
border-right: 1px solid #dedfe2;
} 

effect:
 

http://i.imgur.com/FHSz0OQ.png 

to:

.sf-menu li {
float: left;
position: relative;
background: url('http://i.imgur.com/My8zuQv.png') center right no-repeat;
}