Codeigniter PHP Ad Campaign script

User able to 1. login with username+password 2. Create 1/more campaigns 3. Upload pictures to a campaign 4. Create ad from available images & assign to specific ad slot as specified in table 5. Pause/Stop campaigns 6. Assign loaded credit to a specific campaign's budget 7. Alter a campaign's budget 8. Access a console displaying all ongoing campaigns and the remaining credit/budget 9. Download summary report Admin: Everything in users except alter/load-budget. Approve/Deny uploaded images and campaigns Create/Update/Delete ad slots & properties Ad slot: costs assigned (a field for the cost per week and cost per day) default image when unoccupied hierarchical & can have parent-child relationships e.g Tech>Android>Samsung