### THE PART I TRY TO UPDATE  ####

<td>
			<ul id="category_listing">
				<% @composition.categories.each do |c| %>
					<%= render :partial => 'categories', :locals => { :c => c } %>
				<% end %>
			</ul>
		</td>

		<td>
			<% form_remote_tag :url => {:action => 'add_category', :id => @composition.id} do %>
				<%= select_tag 'category_id', options_for_select(category_options) -%>
				<%= submit_tag 'Add this category'.t %>
				<% end %>
		</td>



#### CATEGORIES PARTIAL ####
<li id="cat_<%= c.id %>">
	<%= c.name %>
	<%= link_to_remote 'Remove this',
		:url => {
			:action => 'remove_category',
			:id => c.id,
			:composition_id => @composition.id },
		:update => 'compositions',
		:method => :post %>
</li>