<form:select id="contract_ce" name="contract_ce" class="select2" data-placeholder="Click to Choose..." path="${status.expression}" items="${contract}" itemValue="name" itemLabel="description" />

name                   description
License                License
Support                Support

<form:select id="category_ce" name="category_ce" class="select2" data-placeholder="Click to Choose..." path="${status.expression}" items="${category}" itemValue="name" itemLabel="description" />

name                   description
License_Training       Training
Licesnse_Clinic        Clinic
Support_Project1       Project1
Support_Project2       Project2

$("#contract_ce").change(function(){
                var value = $("#contract_ce option:selected").val();
                if (value === 'Support') {
                    // Show only name with "Support_"
                } else {
                    // Show only name with "License_"
                }
            });