JSFiddle - React, Tailwind, and code Playground

HTML

<ion-list>
  <div ng-repeat="obj in categorias">
    <ion-item class="item-stable"ng-class="{active: isGroupShown(obj)}"
ng-click="toggleGroup(obj)">
      <i class="icon" ng-class="isGroupShown(obj) ? 'ion-minus' : 'ion-plus'"></i>			            
      {{obj.descricao}}
    </ion-item>
    <ion-item class="item-accordion"ng-click="pesquisarSubAnuncio(obj.id)" ng-repeat="subcategoria in subcategorias" ng-show="isGroupShown(obj)">
      {{subcategoria.descricao}}
    </ion-item>
  </div>
</ion-list>

JavaScript

$scope.toggleGroup = function(obj) {
		    if ($scope.isGroupShown(obj)) {
	    		for(var i=0; i < $scope.categorias.length; i++){
	    			if($scope.categorias[i].id == obj.id){
	    				$scope.categorias[i].subB = $scope.listarSubCategorias(obj.id);
	    				console.log($scope.categorias[i].subB);
	    			}
	    		}
	    		$scope.shownGroup = null;
		    } else {
		    	$scope.shownGroup = obj;
		    }
		};
		  $scope.isGroupShown = function(obj) {
		    return $scope.shownGroup == obj;
		  };