jQuery - Avoid code repetition and shorten script

I've got the following line of jquery that targets each category item within my menu and moves the li to the first ul.main_navigation_level_2. The following works but I have to copy and paste it out 10 times for each different category.

$('li#main_navigation_dept_home_and_furniture_furniture ul.main_navigation_level_2')
  .appendTo('li#main_navigation_dept_home_and_furniture_furniture ul.main_navigation_level_2:first');

The below is my attempt:

$(".main_navigation_level_2").each(function() {
    var menuItem = $(this);


this should be it

$(".main_navigation_level_2").each(function() {
    var menuItem = $(this);

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