This is a fork from the ng-bootstrap library where the accordion is specifically optimized to support arrays.

<ngb-accordion [closeOthers]="true" activeIds="static-0">
	<ngb-panel id="static-{{i}}" title="{{array.title}}" *ngFor="let array of arrays;let i = index;">
		<ng-template ngbPanelContent>
			<div class="row"><div class="col">{{array.content}}</div></div>
		</ng-template>
	</ngb-panel>
</ngb-accordion>

Please note: The ngb-accordion activeIds must be set to static-0 when you desire the function to close other tabs, because it will then trigger the first array object (0) to open. For similar reasons, the ngb-panel id must be set to static-{{i}}. It will get the index of the object and make each tab have an unique id even if you happen to have two arrays in the same accordion.

make the second array's id be static-{{i+n}}, being n the number of tabs your previous array has plus one. Because otherwise, the close others function won't work. The accordion works with unique IDs to make a tab close or open. It is important that the dynamic content keeps it this way.