How to dynamically populate the dropdown menu?

How to dynamically populate the dropdown menu?

Populate the Css class dropdown menu

Clean Up HTML

Spell Check

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Copy

Paste

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Undo

Redo

Break

Insert Paragraph

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Image Gallery

Insert Image

Insert Flash

Insert Media

Downloadable Files

Insert Templates

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Italic

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Left Justify

Center

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Remove Format

Font Color

Set Font Color

HighLight

Set Highlight

Insert Numbered List

Insert Unordered List

Indent Text

Outdent Text

Insert Horizontal Line

Insert Hyperlink

Remove Link

Insert Anchor

Visible Borders

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Select None

New Document

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Find and Replace

Fit to Window - F12

Restore down - F12

Insert Layer

Box Formatting

Insert Table

Table

Form

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Print

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Find and Replace

Fit to Window - F12

Restore down - F12

Select All - CTRL+A

Select None

Normal

HTML

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Add new dropdown menu

Save

Bold

Italic

Underline

Left Justify

Center

Right Justify

Save

Select All - CTRL+A

Select None

Normal

HTML

Preview

Resize