Restructuring how-to section

Author: kasun04

articles/event-hubs/TOC.yml

@@ -218,11 +218,48 @@
               href: https://github.com/Azure/azure-sdk-for-python/blob/master/sdk/eventhub/azure-eventhub/README.md
             - name: JavaScript in GitHub (azure/event-hubs)
               href: https://github.com/Azure/azure-sdk-for-js/blob/master/sdk/eventhub/event-hubs/README.md
+    - name: Use Kafka on Azure Event Hubs
+      items:
+        - name: Kafka developer guide for Event Hubs
+          href: apache-kafka-developer-guide.md
+        - name: Kafka migration guide for Event Hubs
+          href: apache-kafka-migration-guide.md
+        - name: Kafka troubleshooting guide for Event Hubs
+          href: apache-kafka-troubleshooting-guide.md
+        - name: Replicate data from a Kafka cluster to Event Hubs
+          items:
+          - name: Using Apache Kafka Mirror Maker 2
+            href: event-hubs-kafka-mirrormaker-2-tutorial.md
+          - name: Using Apache Kafka Mirror Maker 1
+            href: event-hubs-kafka-mirror-maker-tutorial.md
+        - name: Kafka Connect with Event Hubs
+          items:
+          - name: Integrate Apache Kafka Connect 
+            href: event-hubs-kafka-connect-tutorial.md
+          - name: Connect Apache Spark to an event hub
+            href: event-hubs-kafka-spark-tutorial.md
+          - name: Connect Apache Flink to an event hub
+            href: event-hubs-kafka-flink-tutorial.md
+          - name: Integrate Apache Kafka Connect with Debezium
+            href: event-hubs-kafka-connect-debezium.md
+          - name: Connect Akka Streams to an event hub
+            href: event-hubs-kafka-akka-streams-tutorial.md
+        - name: FAQ - Event Hubs for Kafka
+          href: apache-kafka-frequently-asked-questions.yml
     - name: Use log compaction
       href: use-log-compaction.md
-    - name: Create and manage application groups
-      href: resource-governance-with-app-groups.md
-
+    - name: Use Schema Registry 
+      items:
+        - name: Client-side schema enforcement 
+          items:
+          - name: Using Avro schema 
+            items: 
+            - name: Avro schema with Event Hubs SDK(AMQP)
+              href: schema-registry-dotnet-send-receive-quickstart.md
+          - name: Using JSON Schema  
+            items: 
+            - name: JSON Schema with Apache Kafka applications
+              href: schema-registry-json-schema-kafka.md
     - name: Process data
       items:
         - name: Build real-time dashboard with Power BI dataset
@@ -245,20 +282,6 @@
           href: ../stream-analytics/no-code-filter-ingest-data-explorer.md?toc=/azure/event-hubs/toc.json
         - name: Process data using Azure Stream Analytics
           href: process-data-azure-stream-analytics.md
-    
-    - name: Use Schema Registry 
-      items:
-        - name: Client-side schema enforcement 
-          items:
-          - name: Using Avro schema 
-            items: 
-            - name: Avro schema with Event Hubs SDK(AMQP)
-              href: schema-registry-dotnet-send-receive-quickstart.md
-          - name: Using JSON Schema  
-            items: 
-            - name: JSON Schema with Apache Kafka applications
-              href: schema-registry-json-schema-kafka.md
-
     - name: Integrate with Spring framework
       items:
         - name: Create a Spring Cloud Stream Binder app
@@ -267,46 +290,22 @@
         - name: Use the Spring Boot Starter for Apache Kafka
           href: /java/azure/spring-framework/configure-spring-cloud-stream-binder-java-app-kafka-azure-event-hub
           maintainContext: true
-    - name: Use Kafka on Azure Event Hubs
-      items:
-        - name: Kafka developer guide for Event Hubs
-          href: apache-kafka-developer-guide.md
-        - name: Kafka migration guide for Event Hubs
-          href: apache-kafka-migration-guide.md
-        - name: Kafka troubleshooting guide for Event Hubs
-          href: apache-kafka-troubleshooting-guide.md
-        - name: Replicate data from a Kafka cluster to Event Hubs
-          items:
-          - name: Using Apache Kafka Mirror Maker 2
-            href: event-hubs-kafka-mirrormaker-2-tutorial.md
-          - name: Using Apache Kafka Mirror Maker 1
-            href: event-hubs-kafka-mirror-maker-tutorial.md
-        - name: Kafka Connect with Event Hubs
-          items:
-          - name: Integrate Apache Kafka Connect 
-            href: event-hubs-kafka-connect-tutorial.md
-          - name: Connect Apache Spark to an event hub
-            href: event-hubs-kafka-spark-tutorial.md
-          - name: Connect Apache Flink to an event hub
-            href: event-hubs-kafka-flink-tutorial.md
-          - name: Integrate Apache Kafka Connect with Debezium
-            href: event-hubs-kafka-connect-debezium.md
-          - name: Connect Akka Streams to an event hub
-            href: event-hubs-kafka-akka-streams-tutorial.md
-        - name: FAQ - Event Hubs for Kafka
-          href: apache-kafka-frequently-asked-questions.yml
-    - name: Manage and monitor
+    - name: Manage
       items:
+        - name: Manage Application Groups
+          href: resource-governance-with-app-groups.md
         - name: Configure properties for an event hub
           href: configure-event-hub-properties.md
-        - name: Monitor Azure Event Hubs
-          href: monitor-event-hubs.md
-        - name: Stream Azure Diagnostics data using Event Hubs
-          href: ../azure-monitor/agents/diagnostics-extension-stream-event-hubs.md
         - name: Automatically scale throughput units
           href: event-hubs-auto-inflate.md
         - name: Event Hubs management libraries
           href: event-hubs-management-libraries.md
+    - name: Monitor
+      items:
+        - name: Monitor Azure Event Hubs
+          href: monitor-event-hubs.md
+        - name: Stream Azure Diagnostics data using Event Hubs
+          href: ../azure-monitor/agents/diagnostics-extension-stream-event-hubs.md       
     - name: Secure
       items:
         - name: Allow access from specific IP addresses