admin.py

from django.contrib import admin
from blog.models import Post, Category

class BlogAdmin(admin.ModelAdmin):
    exclude = ['posted']
    prepopulated_fields = {'slug': ('title',)}
    fieldsets = [
    	(None,               {'fields': ['title',]}),
    	(None,				 {'fields': ['slug']}),
    	(None,				 {'fields': ['category']}),
        (None,               {'fields': ['tags']}),
        ('Date information', {'fields': ['datetime'], 'classes': ['collapse']}),
        (None,               {'fields': ['content']}),
    ]

class CategoryAdmin(admin.ModelAdmin):
    prepopulated_fields = {'slug': ('title',)}

admin.site.register(Post, BlogAdmin)
admin.site.register(Category, CategoryAdmin)