customization php script codigniter

Hello We have the php code codeigniter ... We want to customize this script to suit our business as follows First: Adding maintenance services to the script (maintenance services) 1 - Adding a new list to the main list called (maintenance services) that contains sub-menus (maintenance requests - adding a maintenance request - spare parts - adding spare parts) Second: Add maintenance settings: 2- Adding a new sub-menu in the Settings menu called (Maintenance Settings - Commission Settings). Third: Maintenance reports: 3- Adding a new new main list called (maintenance reports contains (profit reports - maintenance reports - commission reports) That's all, here are the details: First: maintenance services: 1- Maintenance requests: [login to view URL] 2 Add a maintenance request: [login to view URL] 3- Spare parts: it is like adding a product in the original script 4 - Adding spare parts: it is like displaying products in the original script Second: Add maintenance settings: 1 - Maintenance settings: This page contains (adding custom fields - maintenance invoice logo - maintenance sections - invoice settings such as invoice logo, phone number, post and notes) 2 - Commission settings: the original script slows down the employees, each employee has a percentage set by the manager on each maintenance process, and in this sheet, the manager writes the percentage he wants - note that the employee’s profit is added to the reports list, employee reports and maintenance profits) Third: Maintenance reports: 1 - Profit reports: Net profit reports are displayed on this page after deducting the employee's commission and not calculating the value of the products used in maintenance. It can be filtered by the maintenance department or by branch and by date 2 - Maintenance reports - On this page, maintenance reports are displayed in terms of pending and completed..etc 3 - Commission reports: The currency of each employee is shown on this page, the profit for each employee, and the total commission for all employees For those who find the same experience and skill to start a discussion and start a project ... I will send the script and additional data in the discussion .. Please contact us only with experience and skill in php and css