css or php help

[Gauravk]

How to have clickable dropdown arrow to display the sub category of car models on demand. By default it loads the sub category and that's not what I want it as I will be having 250+ car models to display on right nav.

https://carnity.com/classifieds/

Any workable solution is highly appreciated. Thanks

 

Current right side category template (if this helps)

{{$catClass = '\IPS\cms\Categories' . \IPS\cms\Databases\Dispatcher::i()->databaseId;}}
{{$categories = $catClass::roots();}}
{{if !empty( $categories )}}
	<h3 class='ipsWidget_title ipsType_reset'>{lang="categories"}</h3>
	<div class='ipsSideMenu ipsAreaBackground_reset ipsPad_half'>
		<ul class='ipsSideMenu_list'>
			{{foreach $categories as $category}}
				<li>
					<a href="{$category->url()}" class='ipsSideMenu_item ipsTruncate ipsTruncate_line'><span class='ipsBadge ipsBadge_style1 ipsPos_right'>{expression="\IPS\cms\Records::contentCount( $category )"}</span><strong class='ipsType_normal'>{$category->_title}</strong></a>
					{{if $category->hasChildren()}}
						<ul class="ipsSideMenu_list">
							{{foreach $category->children() as $idx => $subcategory}}
								<li>
									{{if $idx >= 5}}
										<a href='{$category->url()}' class='ipsSideMenu_item'><span class='ipsType_light ipsType_small'>{lang="and_x_more" sprintf="count( $category->children() ) - 5"}</span></a>
										{{break;}}
									{{else}}
										<a href="{$subcategory->url()}" class='ipsSideMenu_item ipsTruncate ipsTruncate_line'><strong class='ipsPos_right ipsType_small'>{expression="\IPS\cms\Records::contentCount( $subcategory )"}</strong>{$subcategory->_title}</a>
									{{endif}}
								</li>
							{{endforeach}}
						</ul>
					{{endif}}
				</li>
			{{endforeach}}
		</ul>
		<p class='ipsType_center'>
			<a href='{$url->setQueryString('show','categories')}' class=''>{lang="cms_show_categories"} &nbsp;<i class='fa fa-caret-right'></i></a>
		</p>
	</div>
{{endif}}

 

[Gauravk]

Im ready to pay 100 USD for this feature alone.

Any idea where I can post custom order / project. This page isnt working anymore: https://invisionpower.com/resources/project