Customize Codeigniter PHP Script Dashboard

Hi Freelancers, I have a Codeigniter PHP script that needs customizations. You can login to see a live demo here. [login to view URL] Username: admin[AT]gmail[DOT]com (type out the actual thing) Password: 123456 GENERAL / CSS CHANGES: 1) Remove these 3 pages from the menu: “Contracts”, “Calendar”, “Price Lists" 2) Replace the quick link on the top nav: Remove “Emails” and add in “Opportunities” and link to the correct page. 3) Quick renaming of the following: Change “Meetings” into “Lesson Schedule" Change “Sales Teams” into “Classes" Change “Customers” into “Students" Change “Contact persons” (under Customers) into “Parents" Change “Products” into “Catalogue" Change “Product Category” (under Products) into “Grades" Change “Product Type” (under Products) into “Subject" 4) Add custom image icons to each of the menu items All icons are provided 5) Changes to the homepage of the script (dashboard) - Remove “Contracts” and “Quotations” boxes completely - Shift “Invoices” box in place of “Call Logs” and shift “Call Logs” right to the bottom and make it occupy full-width of content area - Rename “Sales Team Performance” into “Class Report” (as for the function, we’ll leave it to a later phase of the project) 6) Remove “Quotations” stage completely in the user workflow process Currently, how this script works is that a user would have to first create a “Quotation” and then upgrade this “Quotation” to a “Sales Order” and finally generating an “Invoice” from this “Sales Order”. I would like this remove this redundant step of creating “Quotations” and the new workflow is that user will create a “Sales Order” and followed by an “Invoice" For your understanding, the difference between a “Sales Order” and an “Invoice” is that the purpose of a “Sales Order” is to generate an invoice based on the products required by the customer and the purpose of an “Invoice” is to track payments received from the customer. ADD 2 NEW FEATURES: 1) Lesson Scheduling feature Lesson scheduling can either be a one time off lesson or a recurring lesson. The single lesson scheduling can already be done in the current script. We are actually using the existing function within the script called “Meetings” which was renamed earlier in Point 3 - A dropdown list of available classes will be added to this scheduling page so that the user can choose from a list of pre-added classes. - The user will also then assign a teacher to this list (which the current script calls “Team Leader”, will be pulled in from the “Staff” module of this script). The dropdown list that right now says “Responsible" - The field that says “Attendees” will be renamed into “Students” (it is already pulling in from the right place the list of students that can be added, previously called “Customers” in Point 3) - How the lesson scheduling feature works is that the user can add either a single lesson or a recurring lesson (similar to your Google calendar or any calendar app). Recurring is most of the time, weekly. The single lesson scheduling feature is already in the script, remember to go to “Meetings” (now renamed as “Lesson Schedule”). - The lessons should be able to be expanded in an accordion-form (See screenshot called “Lesson Scheduling Accordion”). Like what you commonly see in a FAQ section. This is to improve user experience so the user does not need to go into a separate page. 2) Create calendar output page - Note that this calendar output page is the combined output of the lesson scheduling feature. It tells the user what lessons are on a daily, weekly or monthly calendar views (See the attached mockups)