How to remove all li elements inside an ul except the first and the last elements using jQuery?
To remove from all ul-s on the page the li-s that are neither the first nor the last:
$('ul li:not(:first-child):not(:last-child)').remove();
Or using a specific id:
$('#yourul li:not(:first-child):not(:last-child)').remove();
If you have a jQuery object with your ul in it:
$(yourul).find('li:not(:first-child):not(:last-child)').remove();
Have you tried selecting all the list elements, and then removing the first and last ones from the list?
$('ul li').not('li:first, li:last').remove()