Modify code to search database and output info

Good Afternoon Freelancers, Currently our client has a website that has specific content that users can click to display the content in ascending or descending order. Our client would like to modify to filter code so when a user clicks on this content it will show a list of all the different data for that specific content in the database then based on what the user selects it will show only those specific rows that have the content the user selected. Example: User clicks on the content map, it will ascend or descend content based on alphabetical order. Requirement: Client wants the user to click on the content map and it show a list of different maps and how many are listed, when a user clicks on the map, it will show only those maps and the data that corresponds with it.